content: package net.minecraft.server;
  
  import com.google.common.collect.Lists;
  import com.google.common.primitives.Doubles;
  import com.google.common.primitives.Floats;
  import com.google.common.util.concurrent.Futures;
  
  import io.akarin.api.internal.Akari;
  import io.akarin.server.core.AkarinGlobalConfig;
  import io.netty.util.concurrent.Future;
  import io.netty.util.concurrent.GenericFutureListener;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Set;
  import org.apache.commons.lang3.StringUtils;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  // CraftBukkit start
  import java.util.HashSet;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
  import org.bukkit.Location;
  import org.bukkit.craftbukkit.entity.CraftPlayer;
  import org.bukkit.craftbukkit.event.CraftEventFactory;
  import org.bukkit.craftbukkit.inventory.CraftInventoryView;
  import org.bukkit.craftbukkit.inventory.CraftItemStack;
  import org.bukkit.craftbukkit.util.CraftChatMessage;
  import org.bukkit.craftbukkit.util.LazyPlayerSet;
  import org.bukkit.craftbukkit.util.Waitable;
  import org.bukkit.entity.Player;
  import org.bukkit.event.Event;
  import org.bukkit.event.block.Action;
  import org.bukkit.event.block.SignChangeEvent;
  import org.bukkit.event.inventory.ClickType;
  import org.bukkit.event.inventory.CraftItemEvent;
  import org.bukkit.event.inventory.InventoryAction;
  import org.bukkit.event.inventory.InventoryClickEvent;
  import org.bukkit.event.inventory.InventoryCreativeEvent;
  import org.bukkit.event.inventory.InventoryType.SlotType;
  import org.bukkit.event.player.AsyncPlayerChatEvent;
  import org.bukkit.event.player.PlayerAnimationEvent;
  import org.bukkit.event.player.PlayerChatEvent;
  import org.bukkit.event.player.PlayerCommandPreprocessEvent;
  import org.bukkit.event.player.PlayerInteractAtEntityEvent;
  import org.bukkit.event.player.PlayerInteractEntityEvent;
  import org.bukkit.event.player.PlayerItemHeldEvent;
  import org.bukkit.event.player.PlayerKickEvent;
  import org.bukkit.event.player.PlayerMoveEvent;
  import org.bukkit.event.player.PlayerResourcePackStatusEvent;
  import org.bukkit.event.player.PlayerSwapHandItemsEvent;
  import org.bukkit.event.player.PlayerTeleportEvent;
  import org.bukkit.event.player.PlayerToggleFlightEvent;
  import org.bukkit.event.player.PlayerToggleSneakEvent;
  import org.bukkit.event.player.PlayerToggleSprintEvent;
  import org.bukkit.inventory.CraftingInventory;
  import org.bukkit.inventory.EquipmentSlot;
  import org.bukkit.inventory.InventoryView;
  import org.bukkit.util.NumberConversions;
  import com.destroystokyo.paper.event.player.IllegalPacketEvent; // Paper
  import com.destroystokyo.paper.event.player.PlayerJumpEvent; // Paper
  import co.aikar.timings.MinecraftTimings; // Paper
  // CraftBukkit end
  
  /**
   * Akarin Changes Note
   * 1) Add volatile to fields (slack service)
   * 2) Expose private members (slack service)
   * 3) Removed keep-alive codes (slack service)
   * 4) Accessible keep-alive limit (feature, compatibility)
   */
  public class PlayerConnection implements PacketListenerPlayIn, ITickable {
  
      private static final Logger LOGGER = LogManager.getLogger();
      public final NetworkManager networkManager;
      private final MinecraftServer minecraftServer;
      public EntityPlayer player;
      private int e;
      private long f = getCurrentMillis(); public void setLastPing(long lastPing) { this.f = lastPing;}; public long getLastPing() { return this.f;}; // Paper - OBFHELPER - set ping to delay initial // Akarin - private -> public
      private boolean g; public void setPendingPing(boolean isPending) { this.g = isPending;}; public boolean isPendingPing() { return this.g;}; // Paper - OBFHELPER // Akarin - private -> public
      private long h; public void setKeepAliveID(long keepAliveID) { this.h = keepAliveID;}; public long getKeepAliveID() {return this.h; };  // Paper - OBFHELPER // Akarin - private -> public
      // CraftBukkit start - multithreaded fields
      private volatile int chatThrottle;
      private static final AtomicIntegerFieldUpdater chatSpamField = AtomicIntegerFieldUpdater.newUpdater(PlayerConnection.class, "chatThrottle");
      private final java.util.concurrent.atomic.AtomicInteger tabSpamLimiter = new java.util.concurrent.atomic.AtomicInteger(); // Paper - configurable tab spam limits
      // CraftBukkit end
      private int j;
      private final IntHashMap<Short> k = new IntHashMap();
      private double l;
      private double m;
      private double n;
      private double o;
      private double p;
      private double q;
      private Entity r;
      private double s;
      private double t;
      private double u;
      private double v;
      private double w;
      private double x;
      private Vec3D teleportPos;
      private int teleportAwait;
      private int A;
      private boolean B;
      private int C;
      private boolean D;
      private int E;
      private int receivedMovePackets;
      private int processedMovePackets;
      private AutoRecipe H = new AutoRecipe();
      private static final long KEEPALIVE_LIMIT = /*Long.getLong("paper.playerconnection.keepalive", 30)*/ AkarinGlobalConfig.keepAliveTimeout * 1000; // Paper - provide property to set keepalive limit // Akarin - more accessible - keep changes
  
      public PlayerConnection(MinecraftServer minecraftserver, NetworkManager networkmanager, EntityPlayer entityplayer) {
          this.minecraftServer = minecraftserver;
          this.networkManager = networkmanager;
          networkmanager.setPacketListener(this);
          this.player = entityplayer;
          entityplayer.playerConnection = this;
  
          // CraftBukkit start - add fields and methods
          this.server = minecraftserver.server;
      }
  
      private final org.bukkit.craftbukkit.CraftServer server;
      public volatile boolean processedDisconnect; // Akarin - private -> public - volatile
      private int lastTick = MinecraftServer.currentTick;
      private int allowedPlayerTicks = 1;
      private int lastDropTick = MinecraftServer.currentTick;
      private int lastBookTick  = MinecraftServer.currentTick;
      private int dropCount = 0;
      private static final int SURVIVAL_PLACE_DISTANCE_SQUARED = 6 * 6;
      private static final int CREATIVE_PLACE_DISTANCE_SQUARED = 7 * 7;
  
      // Get position of last block hit for BlockDamageLevel.STOPPED
      private double lastPosX = Double.MAX_VALUE;
      private double lastPosY = Double.MAX_VALUE;
      private double lastPosZ = Double.MAX_VALUE;
      private float lastPitch = Float.MAX_VALUE;
      private float lastYaw = Float.MAX_VALUE;
      private boolean justTeleported = false;
      private boolean hasMoved; // Spigot
  
      public CraftPlayer getPlayer() {
          return (this.player == null) ? null : (CraftPlayer) this.player.getBukkitEntity();
      }
      private final static HashSet<Integer> invalidItems = new HashSet<Integer>(java.util.Arrays.asList(8, 9, 10, 11, 26, 34, 36, 43, 51, 55, 59, 62, 63, 64, 68, 71, 74, 75, 83, 90, 92, 93, 94, 104, 105, 115, 117, 118, 119, 125, 127, 132, 140, 141, 142, 144)); // TODO: Check after every update.
      // CraftBukkit end
  
      public void e() {
          this.syncPosition();
          this.player.playerTick();
          this.player.setLocation(this.l, this.m, this.n, this.player.yaw, this.player.pitch);
          ++this.e;
          this.processedMovePackets = this.receivedMovePackets;
          if (this.B) {
              if (++this.C > 80) {
                  PlayerConnection.LOGGER.warn("{} was kicked for floating too long!", this.player.getName());
                  this.disconnect(com.destroystokyo.paper.PaperConfig.flyingKickPlayerMessage); // Paper - use configurable kick message
                  return;
              }
          } else {
              this.B = false;
              this.C = 0;
          }
  
          this.r = this.player.getVehicle();
          if (this.r != this.player && this.r.bE() == this.player) {
              this.s = this.r.locX;
              this.t = this.r.locY;
              this.u = this.r.locZ;
              this.v = this.r.locX;
              this.w = this.r.locY;
              this.x = this.r.locZ;
              if (this.D && this.player.getVehicle().bE() == this.player) {
                  if (++this.E > 80) {
                      PlayerConnection.LOGGER.warn("{} was kicked for floating a vehicle too long!", this.player.getName());
                      this.disconnect(com.destroystokyo.paper.PaperConfig.flyingKickVehicleMessage); // Paper - use configurable kick message
                      return;
                  }
              } else {
                  this.D = false;
                  this.E = 0;
              }
          } else {
              this.r = null;
              this.D = false;
              this.E = 0;
          }
  
          this.minecraftServer.methodProfiler.a("keepAlive");
          /* // Akarin
          // Paper Start - give clients a longer time to respond to pings as per pre 1.12.2 timings
          // This should effectively place the keepalive handling back to "as it was" before 1.12.2
          long currentTime = this.getCurrentMillis();
          long elapsedTime = currentTime - this.getLastPing();
          if (this.isPendingPing()) {
              // We're pending a ping from the client
              if (!this.processedDisconnect && elapsedTime >= KEEPALIVE_LIMIT) { // check keepalive limit, don't fire if already disconnected
                  PlayerConnection.LOGGER.warn("{} was kicked due to keepalive timeout!", this.player.getName()); // more info
                  this.disconnect(new ChatMessage("disconnect.timeout"));
              }
          } else {
              if (elapsedTime >= 15000L) { // 15 seconds
                  this.setPendingPing(true);
                  this.setLastPing(currentTime);
                  this.setKeepAliveID(currentTime);
                  this.sendPacket(new PacketPlayOutKeepAlive(this.getKeepAliveID()));
              }
          }
          // Paper end
          */ // Akarin
  
          this.minecraftServer.methodProfiler.b();
          // CraftBukkit start
          for (int spam; (spam = this.chatThrottle) > 0 && !chatSpamField.compareAndSet(this, spam, spam - 1); ) ;
          if (tabSpamLimiter.get() > 0) tabSpamLimiter.getAndDecrement(); // Paper - split to seperate variable
          /* Use thread-safe field access instead
          if (this.chatThrottle > 0) {
              --this.chatThrottle;
          }
          */
          // CraftBukkit end
  
          if (this.j > 0) {
              --this.j;
          }
  
          if (this.player.J() > 0L && this.minecraftServer.getIdleTimeout() > 0 && MinecraftServer.aw() - this.player.J() > (long) (this.minecraftServer.getIdleTimeout() * 1000 * 60)) {
              this.player.resetIdleTimer(); // CraftBukkit - SPIGOT-854
              this.disconnect(new ChatMessage("multiplayer.disconnect.idling", new Object[0]));
          }
  
      }
  
      public void syncPosition() {
          this.l = this.player.locX;
          this.m = this.player.locY;
          this.n = this.player.locZ;
          this.o = this.player.locX;
          this.p = this.player.locY;
          this.q = this.player.locZ;
      }
  
      public NetworkManager a() {
          return this.networkManager;
      }
  
      // CraftBukkit start
      @Deprecated
      public void disconnect(IChatBaseComponent ichatbasecomponent) {
          disconnect(CraftChatMessage.fromComponent(ichatbasecomponent, EnumChatFormat.WHITE));
      }
      // CraftBukkit end
  
      public void disconnect(String s) {
          // CraftBukkit start - fire PlayerKickEvent
          if (this.processedDisconnect) {
              return;
          }
          String leaveMessage = EnumChatFormat.YELLOW + this.player.getName() + " left the game.";
  
          PlayerKickEvent event = new PlayerKickEvent(this.server.getPlayer(this.player), s, leaveMessage);
  
          if (this.server.getServer().isRunning()) {
              this.server.getPluginManager().callEvent(event);
          }
  
          if (event.isCancelled()) {
              // Do not kick the player
              return;
          }
          // Send the possibly modified leave message
          s = event.getReason();
          // CraftBukkit end
          final ChatComponentText chatcomponenttext = new ChatComponentText(s);
  
          this.networkManager.sendPacket(new PacketPlayOutKickDisconnect(chatcomponenttext), new GenericFutureListener() {
              public void operationComplete(Future future) throws Exception { // CraftBukkit - decompile error
                  PlayerConnection.this.networkManager.close(chatcomponenttext);
              }
          }, new GenericFutureListener[0]);
          this.a(chatcomponenttext); // CraftBukkit - fire quit instantly
          this.networkManager.stopReading();
          // CraftBukkit - Don't wait
          this.minecraftServer.postToMainThread(new Runnable() {
              public void run() {
                  PlayerConnection.this.networkManager.handleDisconnection();
              }
          });
      }
  
      public void a(PacketPlayInSteerVehicle packetplayinsteervehicle) {
          PlayerConnectionUtils.ensureMainThread(packetplayinsteervehicle, this, this.player.x());
          this.player.a(packetplayinsteervehicle.a(), packetplayinsteervehicle.b(), packetplayinsteervehicle.c(), packetplayinsteervehicle.d());
      }
  
      private static boolean b(PacketPlayInFlying packetplayinflying) {
          return Doubles.isFinite(packetplayinflying.a(0.0D)) && Doubles.isFinite(packetplayinflying.b(0.0D)) && Doubles.isFinite(packetplayinflying.c(0.0D)) && Floats.isFinite(packetplayinflying.b(0.0F)) && Floats.isFinite(packetplayinflying.a(0.0F)) ? Math.abs(packetplayinflying.a(0.0D)) > 3.0E7D || Math.abs(packetplayinflying.b(0.0D)) > 3.0E7D || Math.abs(packetplayinflying.c(0.0D)) > 3.0E7D : true;
      }
  
      private static boolean b(PacketPlayInVehicleMove packetplayinvehiclemove) {
          return !Doubles.isFinite(packetplayinvehiclemove.getX()) || !Doubles.isFinite(packetplayinvehiclemove.getY()) || !Doubles.isFinite(packetplayinvehiclemove.getZ()) || !Floats.isFinite(packetplayinvehiclemove.getPitch()) || !Floats.isFinite(packetplayinvehiclemove.getYaw());
      }
  
      public void a(PacketPlayInVehicleMove packetplayinvehiclemove) {
          PlayerConnectionUtils.ensureMainThread(packetplayinvehiclemove, this, this.player.x());
          if (b(packetplayinvehiclemove)) {
              this.disconnect(new ChatMessage("multiplayer.disconnect.invalid_vehicle_movement", new Object[0]));
          } else {
              Entity entity = this.player.getVehicle();
  
              if (entity != this.player && entity.bE() == this.player && entity == this.r) {
                  WorldServer worldserver = this.player.x();
                  double d0 = entity.locX;
                  double d1 = entity.locY;
                  double d2 = entity.locZ;
                  double d3 = packetplayinvehiclemove.getX();
                  double d4 = packetplayinvehiclemove.getY();
                  double d5 = packetplayinvehiclemove.getZ();
                  float f = packetplayinvehiclemove.getYaw();
                  float f1 = packetplayinvehiclemove.getPitch();
                  double d6 = d3 - this.s;
                  double d7 = d4 - this.t;
                  double d8 = d5 - this.u;
                  double d9 = entity.motX * entity.motX + entity.motY * entity.motY + entity.motZ * entity.motZ;
                  double d10 = d6 * d6 + d7 * d7 + d8 * d8;
  
  
                  // CraftBukkit start - handle custom speeds and skipped ticks
                  this.allowedPlayerTicks += (System.currentTimeMillis() / 50) - this.lastTick;
                  this.allowedPlayerTicks = Math.max(this.allowedPlayerTicks, 1);
                  this.lastTick = (int) (System.currentTimeMillis() / 50);
  
                  ++this.receivedMovePackets;
                  int i = this.receivedMovePackets - this.processedMovePackets;
                  if (i > Math.max(this.allowedPlayerTicks, 5)) {
                      PlayerConnection.LOGGER.debug(this.player.getName() + " is sending move packets too frequently (" + i + " packets since last tick)");
                      i = 1;
                  }
  
                  if (d10 > 0) {
                      allowedPlayerTicks -= 1;
                  } else {
                      allowedPlayerTicks = 20;
                  }
                  float speed;
                  if (player.abilities.isFlying) {
                      speed = player.abilities.flySpeed * 20f;
                  } else {
                      speed = player.abilities.walkSpeed * 10f;
                  }
                  speed *= 2f; // TODO: Get the speed of the vehicle instead of the player
  
                  // Paper start - Prevent moving into unloaded chunks
                  if (player.world.paperConfig.preventMovingIntoUnloadedChunks && !worldserver.isChunkLoaded((int) Math.floor(packetplayinvehiclemove.getX()) >> 4, (int) Math.floor(packetplayinvehiclemove.getZ()) >> 4, false)) {
                      this.networkManager.sendPacket(new PacketPlayOutVehicleMove(entity));
                      return;
                  }
                  // Paper end
  
                  if (d10 - d9 > Math.max(100.0D, Math.pow((double) (org.spigotmc.SpigotConfig.movedTooQuicklyMultiplier * (float) i * speed), 2)) && (!this.minecraftServer.R() || !this.minecraftServer.Q().equals(entity.getName()))) { // Spigot
                  // CraftBukkit end
                      PlayerConnection.LOGGER.warn("{} (vehicle of {}) moved too quickly! {},{},{}", entity.getName(), this.player.getName(), Double.valueOf(d6), Double.valueOf(d7), Double.valueOf(d8));
                      this.networkManager.sendPacket(new PacketPlayOutVehicleMove(entity));
                      return;
                  }
  
                  boolean flag = worldserver.getCubes(entity, entity.getBoundingBox().shrink(0.0625D)).isEmpty();
  
                  d6 = d3 - this.v;
                  d7 = d4 - this.w - 1.0E-6D;
                  d8 = d5 - this.x;
                  entity.move(EnumMoveType.PLAYER, d6, d7, d8);
                  double d11 = d7;
  
                  d6 = d3 - entity.locX;
                  d7 = d4 - entity.locY;
                  if (d7 > -0.5D || d7 < 0.5D) {
                      d7 = 0.0D;
                  }
  
                  d8 = d5 - entity.locZ;
                  d10 = d6 * d6 + d7 * d7 + d8 * d8;
                  boolean flag1 = false;
  
                  if (d10 > org.spigotmc.SpigotConfig.movedWronglyThreshold) { // Spigot
                      flag1 = true;
                      PlayerConnection.LOGGER.warn(entity.getName() + " (vehicle of " + this.player.getName() + ") moved wrongly!"); // Paper - More informative
                  }
  
                  entity.setLocation(d3, d4, d5, f, f1);
  				Location curPos = getPlayer().getLocation(); // Paper
                  player.setLocation(d3, d4, d5, player.yaw, player.pitch); // CraftBukkit // Paper
                  boolean flag2 = worldserver.getCubes(entity, entity.getBoundingBox().shrink(0.0625D)).isEmpty();
  
                  if (flag && (flag1 || !flag2)) {
                      entity.setLocation(d0, d1, d2, f, f1);
  					player.setLocation(d3, d4, d5, player.yaw, player.pitch); // CraftBukkit // Paper
                      this.networkManager.sendPacket(new PacketPlayOutVehicleMove(entity));
                      return;
                  }
  
                  // CraftBukkit start - fire PlayerMoveEvent
                  Player player = this.getPlayer();
                  // Spigot Start
                  if ( !hasMoved )
                  {
                      //Location curPos = player.getLocation(); // Paper - move up
                      lastPosX = curPos.getX();
                      lastPosY = curPos.getY();
                      lastPosZ = curPos.getZ();
                      lastYaw = curPos.getYaw();
                      lastPitch = curPos.getPitch();
                      hasMoved = true;
                  }
                  // Spigot End
                  Location from = new Location(player.getWorld(), lastPosX, lastPosY, lastPosZ, lastYaw, lastPitch); // Get the Players previous Event location.
                  Location to = player.getLocation().clone(); // Start off the To location as the Players current location.
  
                  // If the packet contains movement information then we update the To location with the correct XYZ.
                  to.setX(packetplayinvehiclemove.getX());
                  to.setY(packetplayinvehiclemove.getY());
                  to.setZ(packetplayinvehiclemove.getZ());
  
  
                  // If the packet contains look information then we update the To location with the correct Yaw & Pitch.
                  to.setYaw(packetplayinvehiclemove.getYaw());
                  to.setPitch(packetplayinvehiclemove.getPitch());
  
                  // Prevent 40 event-calls for less than a single pixel of movement >.>
                  double delta = Math.pow(this.lastPosX - to.getX(), 2) + Math.pow(this.lastPosY - to.getY(), 2) + Math.pow(this.lastPosZ - to.getZ(), 2);
                  float deltaAngle = Math.abs(this.lastYaw - to.getYaw()) + Math.abs(this.lastPitch - to.getPitch());
  
                  if ((delta > 1f / 256 || deltaAngle > 10f) && !this.player.isFrozen()) {
                      this.lastPosX = to.getX();
                      this.lastPosY = to.getY();
                      this.lastPosZ = to.getZ();
                      this.lastYaw = to.getYaw();
                      this.lastPitch = to.getPitch();
  
                      // Skip the first time we do this
                      if (true) { // Spigot - don't skip any move events
                          Location oldTo = to.clone();
                          PlayerMoveEvent event = new PlayerMoveEvent(player, from, to);
                          this.server.getPluginManager().callEvent(event);
  
                          // If the event is cancelled we move the player back to their old location.
                          if (event.isCancelled()) {
                              teleport(from);
                              return;
                          }
  
                          // If a Plugin has changed the To destination then we teleport the Player
                          // there to avoid any 'Moved wrongly' or 'Moved too quickly' errors.
                          // We only do this if the Event was not cancelled.
                          if (!oldTo.equals(event.getTo()) && !event.isCancelled()) {
                              this.player.getBukkitEntity().teleport(event.getTo(), PlayerTeleportEvent.TeleportCause.PLUGIN);
                              return;
                          }
  
                          // Check to see if the Players Location has some how changed during the call of the event.
                          // This can happen due to a plugin teleporting the player instead of using .setTo()
                          if (!from.equals(this.getPlayer().getLocation()) && this.justTeleported) {
                              this.justTeleported = false;
                              return;
                          }
                      }
                  }
                  // CraftBukkit end
  
                  this.minecraftServer.getPlayerList().d(this.player);
                  this.player.checkMovement(this.player.locX - d0, this.player.locY - d1, this.player.locZ - d2);
                  this.D = d11 >= -0.03125D && !this.minecraftServer.getAllowFlight() && !worldserver.c(entity.getBoundingBox().g(0.0625D).b(0.0D, -0.55D, 0.0D));
                  this.v = entity.locX;
                  this.w = entity.locY;
                  this.x = entity.locZ;
              }
  
          }
      }
  
      public void a(PacketPlayInTeleportAccept packetplayinteleportaccept) {
          PlayerConnectionUtils.ensureMainThread(packetplayinteleportaccept, this, this.player.x());
          if (packetplayinteleportaccept.a() == this.teleportAwait && this.teleportPos != null) { // CraftBukkit
              this.player.setLocation(this.teleportPos.x, this.teleportPos.y, this.teleportPos.z, this.player.yaw, this.player.pitch);
              if (this.player.L()) {
                  this.o = this.teleportPos.x;
                  this.p = this.teleportPos.y;
                  this.q = this.teleportPos.z;
                  this.player.M();
              }
  
              this.teleportPos = null;
          }
  
      }
  
      public void a(PacketPlayInRecipeDisplayed packetplayinrecipedisplayed) {
          PlayerConnectionUtils.ensureMainThread(packetplayinrecipedisplayed, this, this.player.x());
          if (packetplayinrecipedisplayed.a() == PacketPlayInRecipeDisplayed.Status.SHOWN) {
              this.player.F().f(packetplayinrecipedisplayed.b());
          } else if (packetplayinrecipedisplayed.a() == PacketPlayInRecipeDisplayed.Status.SETTINGS) {
              this.player.F().a(packetplayinrecipedisplayed.c());
              this.player.F().b(packetplayinrecipedisplayed.d());
          }
  
      }
  
      public void a(PacketPlayInAdvancements packetplayinadvancements) {
          PlayerConnectionUtils.ensureMainThread(packetplayinadvancements, this, this.player.x());
          if (packetplayinadvancements.b() == PacketPlayInAdvancements.Status.OPENED_TAB) {
              MinecraftKey minecraftkey = packetplayinadvancements.c();
              Advancement advancement = this.minecraftServer.getAdvancementData().a(minecraftkey);
  
              if (advancement != null) {
                  this.player.getAdvancementData().a(advancement);
              }
          }
  
      }
  
      public void a(PacketPlayInFlying packetplayinflying) {
          PlayerConnectionUtils.ensureMainThread(packetplayinflying, this, this.player.x());
          if (b(packetplayinflying)) {
              this.disconnect(new ChatMessage("multiplayer.disconnect.invalid_player_movement", new Object[0]));
          } else {
              WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);
  
              if (!this.player.viewingCredits && !this.player.isFrozen()) { // CraftBukkit
                  if (this.e == 0) {
                      this.syncPosition();
                  }
  
                  if (this.teleportPos != null) {
                      if (this.e - this.A > 20) {
                          this.A = this.e;
                          this.a(this.teleportPos.x, this.teleportPos.y, this.teleportPos.z, this.player.yaw, this.player.pitch);
                      }
                      this.allowedPlayerTicks = 20; // CraftBukkit
                  } else {
                      this.A = this.e;
                      if (this.player.isPassenger()) {
                          this.player.setLocation(this.player.locX, this.player.locY, this.player.locZ, packetplayinflying.a(this.player.yaw), packetplayinflying.b(this.player.pitch));
                          this.minecraftServer.getPlayerList().d(this.player);
                          this.allowedPlayerTicks = 20; // CraftBukkit
                      } else {
                          // CraftBukkit - Make sure the move is valid but then reset it for plugins to modify
                          double prevX = player.locX;
                          double prevY = player.locY;
                          double prevZ = player.locZ;
                          float prevYaw = player.yaw;
                          float prevPitch = player.pitch;
                          // CraftBukkit end
                          double d0 = this.player.locX;
                          double d1 = this.player.locY;
                          double d2 = this.player.locZ;
                          double d3 = this.player.locY;
                          double d4 = packetplayinflying.a(this.player.locX); double toX = d4; // Paper - OBFHELPER
                          double d5 = packetplayinflying.b(this.player.locY);
                          double d6 = packetplayinflying.c(this.player.locZ); double toZ = d6; // Paper - OBFHELPER
                          float f = packetplayinflying.a(this.player.yaw);
                          float f1 = packetplayinflying.b(this.player.pitch);
                          double d7 = d4 - this.l;
                          double d8 = d5 - this.m;
                          double d9 = d6 - this.n;
                          double d10 = this.player.motX * this.player.motX + this.player.motY * this.player.motY + this.player.motZ * this.player.motZ;
                          double d11 = d7 * d7 + d8 * d8 + d9 * d9;
  
                          if (this.player.isSleeping()) {
                              if (d11 > 1.0D) {
                                  this.a(this.player.locX, this.player.locY, this.player.locZ, packetplayinflying.a(this.player.yaw), packetplayinflying.b(this.player.pitch));
                              }
  
                          } else {
                              ++this.receivedMovePackets;
                              int i = this.receivedMovePackets - this.processedMovePackets;
  
                              // CraftBukkit start - handle custom speeds and skipped ticks
                              this.allowedPlayerTicks += (System.currentTimeMillis() / 50) - this.lastTick;
                              this.allowedPlayerTicks = Math.max(this.allowedPlayerTicks, 1);
                              this.lastTick = (int) (System.currentTimeMillis() / 50);
  
                              if (i > Math.max(this.allowedPlayerTicks, 5)) {
                                  PlayerConnection.LOGGER.debug("{} is sending move packets too frequently ({} packets since last tick)", this.player.getName(), Integer.valueOf(i));
                                  i = 1;
                              }
  
                              if (packetplayinflying.hasLook || d11 > 0) {
                                  allowedPlayerTicks -= 1;
                              } else {
                                  allowedPlayerTicks = 20;
                              }
                              float speed;
                              if (player.abilities.isFlying) {
                                  speed = player.abilities.flySpeed * 20f;
                              } else {
                                  speed = player.abilities.walkSpeed * 10f;
                              }
  
                              // Paper start - Prevent moving into unloaded chunks
                              if (player.world.paperConfig.preventMovingIntoUnloadedChunks && (this.player.locX != toX || this.player.locZ != toZ) && !worldserver.isChunkLoaded((int) Math.floor(toX) >> 4, (int) Math.floor(toZ) >> 4, false)) {
                                  this.internalTeleport(this.player.locX, this.player.locY, this.player.locZ, this.player.yaw, this.player.pitch, Collections.emptySet());
                                  return;
                              }
                              // Paper end
  
                              if (!this.player.L() && (!this.player.x().getGameRules().getBoolean("disableElytraMovementCheck") || !this.player.cP())) {
                                  float f2 = this.player.cP() ? 300.0F : 100.0F;
  
                                  if (d11 - d10 > Math.max(f2, Math.pow((double) (org.spigotmc.SpigotConfig.movedTooQuicklyMultiplier * (float) i * speed), 2)) && (!this.minecraftServer.R() || !this.minecraftServer.Q().equals(this.player.getName()))) { // Spigot
                                  // CraftBukkit end
                                      PlayerConnection.LOGGER.warn("{} moved too quickly! {},{},{}", this.player.getName(), Double.valueOf(d7), Double.valueOf(d8), Double.valueOf(d9));
                                      this.a(this.player.locX, this.player.locY, this.player.locZ, this.player.yaw, this.player.pitch);
                                      return;
                                  }
                              }
  
                              boolean flag = worldserver.getCubes(this.player, this.player.getBoundingBox().shrink(0.0625D)).isEmpty();
  
                              d7 = d4 - this.o;
                              d8 = d5 - this.p;
                              d9 = d6 - this.q;
                              if (this.player.onGround && !packetplayinflying.a() && d8 > 0.0D) {
                                  // Paper start - Add player jump event
                                  Player player = this.getPlayer();
                                  Location from = new Location(player.getWorld(), lastPosX, lastPosY, lastPosZ, lastYaw, lastPitch); // Get the Players previous Event location.
                                  Location to = player.getLocation().clone(); // Start off the To location as the Players current location.
  
                                  // If the packet contains movement information then we update the To location with the correct XYZ.
                                  if (packetplayinflying.hasPos) {
                                      to.setX(packetplayinflying.x);
                                      to.setY(packetplayinflying.y);
                                      to.setZ(packetplayinflying.z);
                                  }
  
                                  // If the packet contains look information then we update the To location with the correct Yaw & Pitch.
                                  if (packetplayinflying.hasLook) {
                                      to.setYaw(packetplayinflying.yaw);
                                      to.setPitch(packetplayinflying.pitch);
                                  }
  
                                  PlayerJumpEvent event = new PlayerJumpEvent(player, from, to);
  
                                  if (event.callEvent()) {
                                      this.player.jump();
                                  } else {
                                      from = event.getFrom();
                                      this.internalTeleport(from.getX(), from.getY(), from.getZ(), from.getYaw(), from.getPitch(), Collections.emptySet());
                                      return;
                                  }
                                  // Paper end
                              }
  
                              this.player.move(EnumMoveType.PLAYER, d7, d8, d9);
                              this.player.onGround = packetplayinflying.a();
                              double d12 = d8;
  
                              d7 = d4 - this.player.locX;
                              d8 = d5 - this.player.locY;
                              if (d8 > -0.5D || d8 < 0.5D) {
                                  d8 = 0.0D;
                              }
  
                              d9 = d6 - this.player.locZ;
                              d11 = d7 * d7 + d8 * d8 + d9 * d9;
                              boolean flag1 = false;
  
                              if (!this.player.L() && d11 > org.spigotmc.SpigotConfig.movedWronglyThreshold && !this.player.isSleeping() && !this.player.playerInteractManager.isCreative() && this.player.playerInteractManager.getGameMode() != EnumGamemode.SPECTATOR) { // Spigot
                                  flag1 = true;
                                  PlayerConnection.LOGGER.warn("{} moved wrongly!", this.player.getName());
                              }
  
                              this.player.setLocation(d4, d5, d6, f, f1);
                              this.player.checkMovement(this.player.locX - d0, this.player.locY - d1, this.player.locZ - d2);
                              if (!this.player.noclip && !this.player.isSleeping()) {
                                  boolean flag2 = worldserver.getCubes(this.player, this.player.getBoundingBox().shrink(0.0625D)).isEmpty();
  
                                  if (flag && (flag1 || !flag2)) {
                                      this.a(d0, d1, d2, f, f1);
                                      return;
                                  }
                              }
  
                              // CraftBukkit start - fire PlayerMoveEvent
                              // Rest to old location first
                              this.player.setLocation(prevX, prevY, prevZ, prevYaw, prevPitch);
  
                              Player player = this.getPlayer();
                              Location from = new Location(player.getWorld(), lastPosX, lastPosY, lastPosZ, lastYaw, lastPitch); // Get the Players previous Event location.
                              Location to = player.getLocation().clone(); // Start off the To location as the Players current location.
  
                              // If the packet contains movement information then we update the To location with the correct XYZ.
                              if (packetplayinflying.hasPos) {
                                  to.setX(packetplayinflying.x);
                                  to.setY(packetplayinflying.y);
                                  to.setZ(packetplayinflying.z);
                              }
  
                              // If the packet contains look information then we update the To location with the correct Yaw & Pitch.
                              if (packetplayinflying.hasLook) {
                                  to.setYaw(packetplayinflying.yaw);
                                  to.setPitch(packetplayinflying.pitch);
                              }
  
                              // Prevent 40 event-calls for less than a single pixel of movement >.>
                              double delta = Math.pow(this.lastPosX - to.getX(), 2) + Math.pow(this.lastPosY - to.getY(), 2) + Math.pow(this.lastPosZ - to.getZ(), 2);
                              float deltaAngle = Math.abs(this.lastYaw - to.getYaw()) + Math.abs(this.lastPitch - to.getPitch());
  
                              if ((delta > 1f / 256 || deltaAngle > 10f) && !this.player.isFrozen()) {
                                  this.lastPosX = to.getX();
                                  this.lastPosY = to.getY();
                                  this.lastPosZ = to.getZ();
                                  this.lastYaw = to.getYaw();
                                  this.lastPitch = to.getPitch();
  
                                  // Skip the first time we do this
                                  if (from.getX() != Double.MAX_VALUE) {
                                      Location oldTo = to.clone();
                                      PlayerMoveEvent event = new PlayerMoveEvent(player, from, to);
                                      this.server.getPluginManager().callEvent(event);
  
                                      // If the event is cancelled we move the player back to their old location.
                                      if (event.isCancelled()) {
                                          teleport(from);
                                          return;
                                      }
  
                                      // If a Plugin has changed the To destination then we teleport the Player
                                      // there to avoid any 'Moved wrongly' or 'Moved too quickly' errors.
                                      // We only do this if the Event was not cancelled.
                                      if (!oldTo.equals(event.getTo()) && !event.isCancelled()) {
                                          this.player.getBukkitEntity().teleport(event.getTo(), PlayerTeleportEvent.TeleportCause.PLUGIN);
                                          return;
                                      }
  
                                      // Check to see if the Players Location has some how changed during the call of the event.
                                      // This can happen due to a plugin teleporting the player instead of using .setTo()
                                      if (!from.equals(this.getPlayer().getLocation()) && this.justTeleported) {
                                          this.justTeleported = false;
                                          return;
                                      }
                                  }
                              }
                              this.player.setLocation(d4, d5, d6, f, f1); // Copied from above
                              // CraftBukkit end
  
                              this.B = d12 >= -0.03125D;
                              this.B &= !this.minecraftServer.getAllowFlight() && !this.player.abilities.canFly;
                              this.B &= !this.player.hasEffect(MobEffects.LEVITATION) && !this.player.cP() && !worldserver.c(this.player.getBoundingBox().g(0.0625D).b(0.0D, -0.55D, 0.0D));
                              this.player.onGround = packetplayinflying.a();
                              this.minecraftServer.getPlayerList().d(this.player);
                              this.player.a(this.player.locY - d3, packetplayinflying.a());
                              this.o = this.player.locX;
                              this.p = this.player.locY;
                              this.q = this.player.locZ;
                          }
                      }
                  }
              }
          }
      }
  
      public void a(double d0, double d1, double d2, float f, float f1) {
          this.a(d0, d1, d2, f, f1, Collections.<PacketPlayOutPosition.EnumPlayerTeleportFlags>emptySet());
      }
  
      // CraftBukkit start - Delegate to teleport(Location)
      public void a(double d0, double d1, double d2, float f, float f1, PlayerTeleportEvent.TeleportCause cause) {
          this.a(d0, d1, d2, f, f1, Collections.<PacketPlayOutPosition.EnumPlayerTeleportFlags>emptySet(), cause);
      }
  
      public void a(double d0, double d1, double d2, float f, float f1, Set<PacketPlayOutPosition.EnumPlayerTeleportFlags> set) {
          this.a(d0, d1, d2, f, f1, set, PlayerTeleportEvent.TeleportCause.UNKNOWN);
      }
  
      public void a(double d0, double d1, double d2, float f, float f1, Set<PacketPlayOutPosition.EnumPlayerTeleportFlags> set, PlayerTeleportEvent.TeleportCause cause) {
          Player player = this.getPlayer();
          Location from = player.getLocation();
  
          double x = d0;
          double y = d1;
          double z = d2;
          float yaw = f;
          float pitch = f1;
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.X)) {
              x += from.getX();
          }
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.Y)) {
              y += from.getY();
          }
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.Z)) {
              z += from.getZ();
          }
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.Y_ROT)) {
              yaw += from.getYaw();
          }
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.X_ROT)) {
              pitch += from.getPitch();
          }
  
  
          Location to = new Location(this.getPlayer().getWorld(), x, y, z, yaw, pitch);
          PlayerTeleportEvent event = new PlayerTeleportEvent(player, from.clone(), to.clone(), cause);
          this.server.getPluginManager().callEvent(event);
  
          if (event.isCancelled() || !to.equals(event.getTo())) {
              set.clear(); // Can't relative teleport
              to = event.isCancelled() ? event.getFrom() : event.getTo();
              d0 = to.getX();
              d1 = to.getY();
              d2 = to.getZ();
              f = to.getYaw();
              f1 = to.getPitch();
          }
  
          this.internalTeleport(d0, d1, d2, f, f1, set);
      }
  
      public void teleport(Location dest) {
          internalTeleport(dest.getX(), dest.getY(), dest.getZ(), dest.getYaw(), dest.getPitch(), Collections.<PacketPlayOutPosition.EnumPlayerTeleportFlags>emptySet());
      }
  
      private void internalTeleport(double d0, double d1, double d2, float f, float f1, Set<PacketPlayOutPosition.EnumPlayerTeleportFlags> set) {
          // CraftBukkit start
          if (Float.isNaN(f)) {
              f = 0;
          }
          if (Float.isNaN(f1)) {
              f1 = 0;
          }
  
          this.justTeleported = true;
          // CraftBukkit end
          double d3 = set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.X) ? this.player.locX : 0.0D;
          double d4 = set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.Y) ? this.player.locY : 0.0D;
          double d5 = set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.Z) ? this.player.locZ : 0.0D;
  
          this.teleportPos = new Vec3D(d0 + d3, d1 + d4, d2 + d5);
          float f2 = f;
          float f3 = f1;
  
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.Y_ROT)) {
              f2 = f + this.player.yaw;
          }
  
          if (set.contains(PacketPlayOutPosition.EnumPlayerTeleportFlags.X_ROT)) {
              f3 = f1 + this.player.pitch;
          }
  
          // CraftBukkit start - update last location
          this.lastPosX = this.teleportPos.x;
          this.lastPosY = this.teleportPos.y;
          this.lastPosZ = this.teleportPos.z;
          this.lastYaw = f2;
          this.lastPitch = f3;
          // CraftBukkit end
  
          if (++this.teleportAwait == Integer.MAX_VALUE) {
              this.teleportAwait = 0;
          }
  
          this.A = this.e;
          this.player.setLocation(this.teleportPos.x, this.teleportPos.y, this.teleportPos.z, f2, f3);
          this.player.playerConnection.sendPacket(new PacketPlayOutPosition(d0, d1, d2, f, f1, set, this.teleportAwait));
      }
  
      public void a(PacketPlayInBlockDig packetplayinblockdig) {
          PlayerConnectionUtils.ensureMainThread(packetplayinblockdig, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);
          BlockPosition blockposition = packetplayinblockdig.a();
  
          this.player.resetIdleTimer();
          switch (packetplayinblockdig.c()) {
          case SWAP_HELD_ITEMS:
              if (!this.player.isSpectator()) {
                  ItemStack itemstack = this.player.b(EnumHand.OFF_HAND);
  
                  // CraftBukkit start
                  PlayerSwapHandItemsEvent swapItemsEvent = new PlayerSwapHandItemsEvent(getPlayer(), CraftItemStack.asBukkitCopy(itemstack), CraftItemStack.asBukkitCopy(this.player.b(EnumHand.MAIN_HAND)));
                  this.server.getPluginManager().callEvent(swapItemsEvent);
                  if (swapItemsEvent.isCancelled()) {
                      return;
                  }
                  itemstack = CraftItemStack.asNMSCopy(swapItemsEvent.getMainHandItem());
                  this.player.a(EnumHand.OFF_HAND, CraftItemStack.asNMSCopy(swapItemsEvent.getOffHandItem()));
                  // CraftBukkit end
                  this.player.a(EnumHand.MAIN_HAND, itemstack);
              }
  
              return;
  
          case DROP_ITEM:
              if (!this.player.isSpectator()) {
                  // limit how quickly items can be dropped
                  // If the ticks aren't the same then the count starts from 0 and we update the lastDropTick.
                  if (this.lastDropTick != MinecraftServer.currentTick) {
                      this.dropCount = 0;
                      this.lastDropTick = MinecraftServer.currentTick;
                  } else {
                      // Else we increment the drop count and check the amount.
                      this.dropCount++;
                      if (this.dropCount >= 20) {
                          LOGGER.warn(this.player.getName() + " dropped their items too quickly!");
                          this.disconnect("You dropped your items too quickly (Hacking?)");
                          return;
                      }
                  }
                  // CraftBukkit end
                  this.player.a(false);
              }
  
              return;
  
          case DROP_ALL_ITEMS:
              if (!this.player.isSpectator()) {
                  this.player.a(true);
              }
  
              return;
  
          case RELEASE_USE_ITEM:
              this.player.clearActiveItem();
              return;
  
          case START_DESTROY_BLOCK:
          case ABORT_DESTROY_BLOCK:
          case STOP_DESTROY_BLOCK:
              // NeonPaper start - Don't allow digging in unloaded chunks
              if (!worldserver.isChunkLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4, true)) {
                   return;
              }
              // NeonPaper end - Don't allow digging in unloaded chunks
              double d0 = this.player.locX - ((double) blockposition.getX() + 0.5D);
              double d1 = this.player.locY - ((double) blockposition.getY() + 0.5D) + 1.5D;
              double d2 = this.player.locZ - ((double) blockposition.getZ() + 0.5D);
              double d3 = d0 * d0 + d1 * d1 + d2 * d2;
  
              if (d3 > 36.0D) {
                  if (worldserver.isChunkLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4, true)) // Paper - Fix block break desync - Don't send for unloaded chunks
                      this.sendPacket(new PacketPlayOutBlockChange(worldserver, blockposition)); // Paper - Fix block break desync
                  return;
              } else if (blockposition.getY() >= this.minecraftServer.getMaxBuildHeight()) {
                  return;
              } else {
                  if (packetplayinblockdig.c() == PacketPlayInBlockDig.EnumPlayerDigType.START_DESTROY_BLOCK) {
                      if (!this.minecraftServer.a(worldserver, blockposition, this.player) && worldserver.getWorldBorder().a(blockposition)) {
                          this.player.playerInteractManager.a(blockposition, packetplayinblockdig.b());
                      } else {
                          // CraftBukkit start - fire PlayerInteractEvent
                          CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_BLOCK, blockposition, packetplayinblockdig.b(), this.player.inventory.getItemInHand(), EnumHand.MAIN_HAND);
                          this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(worldserver, blockposition));
                          // Update any tile entity data for this block
                          TileEntity tileentity = worldserver.getTileEntity(blockposition);
                          if (tileentity != null) {
                              this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
                          }
                          // CraftBukkit end
                      }
                  } else {
                      if (packetplayinblockdig.c() == PacketPlayInBlockDig.EnumPlayerDigType.STOP_DESTROY_BLOCK) {
                          this.player.playerInteractManager.a(blockposition);
                      } else if (packetplayinblockdig.c() == PacketPlayInBlockDig.EnumPlayerDigType.ABORT_DESTROY_BLOCK) {
                          this.player.playerInteractManager.e();
                      }
  
                      if (worldserver.getType(blockposition).getMaterial() != Material.AIR) {
                          this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(worldserver, blockposition));
                      }
                  }
  
                  return;
              }
  
          default:
              throw new IllegalArgumentException("Invalid player action");
          }
          // CraftBukkit end
      }
  
      // Spigot start - limit place/interactions
      private int limitedPackets;
      private long lastLimitedPacket = -1;
      private static final int THRESHOLD = com.destroystokyo.paper.PaperConfig.packetInSpamThreshold; // Paper - Configurable threshold
  
      private boolean checkLimit(long timestamp) {
          if (lastLimitedPacket != -1 && timestamp - lastLimitedPacket < THRESHOLD && limitedPackets++ >= 8) { // Paper - Use threshold, raise packet limit to 8
              return false;
          }
  
          if (lastLimitedPacket == -1 || timestamp - lastLimitedPacket >= THRESHOLD) { // Paper
              lastLimitedPacket = timestamp;
              limitedPackets = 0;
              return true;
          }
  
          return true;
      }
      // Spigot end
  
      public void a(PacketPlayInUseItem packetplayinuseitem) {
          PlayerConnectionUtils.ensureMainThread(packetplayinuseitem, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          if (!checkLimit(packetplayinuseitem.timestamp)) return; // Spigot - check limit
          WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);
          EnumHand enumhand = packetplayinuseitem.c();
          ItemStack itemstack = this.player.b(enumhand);
          BlockPosition blockposition = packetplayinuseitem.a();
          EnumDirection enumdirection = packetplayinuseitem.b();
  
          this.player.resetIdleTimer();
          if (blockposition.getY() >= this.minecraftServer.getMaxBuildHeight() - 1 && (enumdirection == EnumDirection.UP || blockposition.getY() >= this.minecraftServer.getMaxBuildHeight())) {
              ChatMessage chatmessage = new ChatMessage("build.tooHigh", new Object[] { Integer.valueOf(this.minecraftServer.getMaxBuildHeight())});
  
              chatmessage.getChatModifier().setColor(EnumChatFormat.RED);
              this.player.playerConnection.sendPacket(new PacketPlayOutChat(chatmessage, ChatMessageType.GAME_INFO));
          } else if (this.teleportPos == null && this.player.d((double) blockposition.getX() + 0.5D, (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D) < 64.0D && !this.minecraftServer.a(worldserver, blockposition, this.player) && worldserver.getWorldBorder().a(blockposition)) {
              // CraftBukkit start - Check if we can actually do something over this large a distance
              Location eyeLoc = this.getPlayer().getEyeLocation();
              double reachDistance = NumberConversions.square(eyeLoc.getX() - blockposition.getX()) + NumberConversions.square(eyeLoc.getY() - blockposition.getY()) + NumberConversions.square(eyeLoc.getZ() - blockposition.getZ());
              if (reachDistance > (this.getPlayer().getGameMode() == org.bukkit.GameMode.CREATIVE ? CREATIVE_PLACE_DISTANCE_SQUARED : SURVIVAL_PLACE_DISTANCE_SQUARED)) {
                  return;
              }
              // CraftBukkit end
              this.player.playerInteractManager.a(this.player, worldserver, itemstack, enumhand, blockposition, enumdirection, packetplayinuseitem.d(), packetplayinuseitem.e(), packetplayinuseitem.f());
          }
  
          this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(worldserver, blockposition));
          this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(worldserver, blockposition.shift(enumdirection)));
      }
  
      public void a(PacketPlayInBlockPlace packetplayinblockplace) {
          PlayerConnectionUtils.ensureMainThread(packetplayinblockplace, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          if (!checkLimit(packetplayinblockplace.timestamp)) return; // Spigot - check limit
          WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);
          EnumHand enumhand = packetplayinblockplace.a();
          ItemStack itemstack = this.player.b(enumhand);
  
          this.player.resetIdleTimer();
          if (!itemstack.isEmpty()) {
              // CraftBukkit start
              // Raytrace to look for 'rogue armswings'
              float f1 = this.player.pitch;
              float f2 = this.player.yaw;
              double d0 = this.player.locX;
              double d1 = this.player.locY + (double) this.player.getHeadHeight();
              double d2 = this.player.locZ;
              Vec3D vec3d = new Vec3D(d0, d1, d2);
  
              float f3 = MathHelper.cos(-f2 * 0.017453292F - 3.1415927F);
              float f4 = MathHelper.sin(-f2 * 0.017453292F - 3.1415927F);
              float f5 = -MathHelper.cos(-f1 * 0.017453292F);
              float f6 = MathHelper.sin(-f1 * 0.017453292F);
              float f7 = f4 * f5;
              float f8 = f3 * f5;
              double d3 = player.playerInteractManager.getGameMode()== EnumGamemode.CREATIVE ? 5.0D : 4.5D;
              Vec3D vec3d1 = vec3d.add((double) f7 * d3, (double) f6 * d3, (double) f8 * d3);
              MovingObjectPosition movingobjectposition = this.player.world.rayTrace(vec3d, vec3d1, false);
  
              boolean cancelled;
              if (movingobjectposition == null || movingobjectposition.type != MovingObjectPosition.EnumMovingObjectType.BLOCK) {
                  org.bukkit.event.player.PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(this.player, Action.RIGHT_CLICK_AIR, itemstack, enumhand);
                  cancelled = event.useItemInHand() == Event.Result.DENY;
              } else {
                  if (player.playerInteractManager.firedInteract) {
                      player.playerInteractManager.firedInteract = false;
                      cancelled = player.playerInteractManager.interactResult;
                  } else {
                      org.bukkit.event.player.PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(player, Action.RIGHT_CLICK_BLOCK, movingobjectposition.a(), movingobjectposition.direction, itemstack, true, enumhand);
                      cancelled = event.useItemInHand() == Event.Result.DENY;
                  }
              }
  
              if (cancelled) {
                  this.player.getBukkitEntity().updateInventory(); // SPIGOT-2524
              } else {
                  this.player.playerInteractManager.a(this.player, worldserver, itemstack, enumhand);
              }
              // CraftBukkit end
          }
      }
  
      public void a(PacketPlayInSpectate packetplayinspectate) {
          PlayerConnectionUtils.ensureMainThread(packetplayinspectate, this, this.player.x());
          if (this.player.isSpectator()) {
              Entity entity = null;
              WorldServer[] aworldserver = this.minecraftServer.worldServer;
              int i = aworldserver.length;
  
              // CraftBukkit - use the worlds array list
              for (WorldServer worldserver : minecraftServer.worlds) {
  
                  if (worldserver != null) {
                      entity = packetplayinspectate.a(worldserver);
                      if (entity != null) {
                          break;
                      }
                  }
              }
  
              if (entity != null) {
                  this.player.setSpectatorTarget(this.player);
                  this.player.stopRiding();
  
                  /* CraftBukkit start - replace with bukkit handling for multi-world
                  if (entity.world == this.player.world) {
                      this.player.enderTeleportTo(entity.locX, entity.locY, entity.locZ);
                  } else {
                      WorldServer worldserver1 = this.player.x();
                      WorldServer worldserver2 = (WorldServer) entity.world;
  
                      this.player.dimension = entity.dimension;
                      this.sendPacket(new PacketPlayOutRespawn(this.player.dimension, worldserver1.getDifficulty(), worldserver1.getWorldData().getType(), this.player.playerInteractManager.getGameMode()));
                      this.minecraftServer.getPlayerList().f(this.player);
                      worldserver1.removeEntity(this.player);
                      this.player.dead = false;
                      this.player.setPositionRotation(entity.locX, entity.locY, entity.locZ, entity.yaw, entity.pitch);
                      if (this.player.isAlive()) {
                          worldserver1.entityJoinedWorld(this.player, false);
                          worldserver2.addEntity(this.player);
                          worldserver2.entityJoinedWorld(this.player, false);
                      }
  
                      this.player.spawnIn(worldserver2);
                      this.minecraftServer.getPlayerList().a(this.player, worldserver1);
                      this.player.enderTeleportTo(entity.locX, entity.locY, entity.locZ);
                      this.player.playerInteractManager.a(worldserver2);
                      this.minecraftServer.getPlayerList().b(this.player, worldserver2);
                      this.minecraftServer.getPlayerList().updateClient(this.player);
                  }
                  */
                  this.player.getBukkitEntity().teleport(entity.getBukkitEntity(), PlayerTeleportEvent.TeleportCause.SPECTATE);
                  // CraftBukkit end
              }
          }
  
      }
  
      // CraftBukkit start
      public void a(PacketPlayInResourcePackStatus packetplayinresourcepackstatus) {
          PlayerConnectionUtils.ensureMainThread(packetplayinresourcepackstatus, this, this.player.x());
          // Paper start
          //this.server.getPluginManager().callEvent(new PlayerResourcePackStatusEvent(getPlayer(), PlayerResourcePackStatusEvent.Status.values()[packetplayinresourcepackstatus.status.ordinal()]));
          final PlayerResourcePackStatusEvent.Status status = PlayerResourcePackStatusEvent.Status.values()[packetplayinresourcepackstatus.status.ordinal()];
          this.getPlayer().setResourcePackStatus(status);
          this.server.getPluginManager().callEvent(new PlayerResourcePackStatusEvent(getPlayer(), status));
          // Paper end
      }
      // CraftBukkit end
  
      public void a(PacketPlayInBoatMove packetplayinboatmove) {
          PlayerConnectionUtils.ensureMainThread(packetplayinboatmove, this, this.player.x());
          Entity entity = this.player.bJ();
  
          if (entity instanceof EntityBoat) {
              ((EntityBoat) entity).a(packetplayinboatmove.a(), packetplayinboatmove.b());
          }
  
      }
  
      public void a(IChatBaseComponent ichatbasecomponent) {
          // CraftBukkit start - Rarely it would send a disconnect line twice
          if (this.processedDisconnect) {
              return;
          } else {
              this.processedDisconnect = true;
          }
          // CraftBukkit end
          PlayerConnection.LOGGER.info("{} lost connection: {}", this.player.getName(), ichatbasecomponent.toPlainText());
          // CraftBukkit start - Replace vanilla quit message handling with our own.
          /*
          this.minecraftServer.aD();
          ChatMessage chatmessage = new ChatMessage("multiplayer.player.left", new Object[] { this.player.getScoreboardDisplayName()});
  
          chatmessage.getChatModifier().setColor(EnumChatFormat.YELLOW);
          this.minecraftServer.getPlayerList().sendMessage(chatmessage);
          */
  
          this.player.s();
          String quitMessage = this.minecraftServer.getPlayerList().disconnect(this.player);
          if ((quitMessage != null) && (quitMessage.length() > 0)) {
              this.minecraftServer.getPlayerList().sendMessage(CraftChatMessage.fromString(quitMessage));
          }
          // CraftBukkit end
          if (this.minecraftServer.R() && this.player.getName().equals(this.minecraftServer.Q())) {
              PlayerConnection.LOGGER.info("Stopping singleplayer server as player logged out");
              this.minecraftServer.safeShutdown();
          }
  
      }
  
      public void sendPacket(final Packet<?> packet) {
          if (packet instanceof PacketPlayOutChat) {
              PacketPlayOutChat packetplayoutchat = (PacketPlayOutChat) packet;
              EntityHuman.EnumChatVisibility entityhuman_enumchatvisibility = this.player.getChatFlags();
  
              if (entityhuman_enumchatvisibility == EntityHuman.EnumChatVisibility.HIDDEN && packetplayoutchat.c() != ChatMessageType.GAME_INFO) {
                  return;
              }
  
              if (entityhuman_enumchatvisibility == EntityHuman.EnumChatVisibility.SYSTEM && !packetplayoutchat.b()) {
                  return;
              }
          }
  
          // CraftBukkit start
          if (packet == null || this.processedDisconnect) { // Spigot
              return;
          } else if (packet instanceof PacketPlayOutSpawnPosition) {
              PacketPlayOutSpawnPosition packet6 = (PacketPlayOutSpawnPosition) packet;
              this.player.compassTarget = new Location(this.getPlayer().getWorld(), packet6.position.getX(), packet6.position.getY(), packet6.position.getZ());
          }
          // CraftBukkit end
  
          try {
              this.networkManager.sendPacket(packet);
          } catch (Throwable throwable) {
              CrashReport crashreport = CrashReport.a(throwable, "Sending packet");
              CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Packet being sent");
  
              crashreportsystemdetails.a("Packet class", new CrashReportCallable() {
                  public String a() throws Exception {
                      return packet.getClass().getCanonicalName();
                  }
  
                  public Object call() throws Exception {
                      return this.a();
                  }
              });
              throw new ReportedException(crashreport);
          }
      }
  
      public void a(PacketPlayInHeldItemSlot packetplayinhelditemslot) {
          PlayerConnectionUtils.ensureMainThread(packetplayinhelditemslot, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          if (packetplayinhelditemslot.a() >= 0 && packetplayinhelditemslot.a() < PlayerInventory.getHotbarSize()) {
              PlayerItemHeldEvent event = new PlayerItemHeldEvent(this.getPlayer(), this.player.inventory.itemInHandIndex, packetplayinhelditemslot.a());
              this.server.getPluginManager().callEvent(event);
              if (event.isCancelled()) {
                  this.sendPacket(new PacketPlayOutHeldItemSlot(this.player.inventory.itemInHandIndex));
                  this.player.resetIdleTimer();
                  return;
              }
              // CraftBukkit end
              this.player.inventory.itemInHandIndex = packetplayinhelditemslot.a();
              this.player.resetIdleTimer();
          } else {
              PlayerConnection.LOGGER.warn("{} tried to set an invalid carried item", this.player.getName());
              this.disconnect("Invalid hotbar selection (Hacking?)"); // CraftBukkit //Spigot "Nope" -> Descriptive reason
          }
      }
  
      public void a(PacketPlayInChat packetplayinchat) {
          // CraftBukkit start - async chat
          // SPIGOT-3638
          if (this.minecraftServer.isStopped()) {
              return;
          }
  
          boolean isSync = packetplayinchat.a().startsWith("/");
          if (packetplayinchat.a().startsWith("/")) {
              PlayerConnectionUtils.ensureMainThread(packetplayinchat, this, this.player.x());
          }
          // CraftBukkit end
          if (this.player.dead || this.player.getChatFlags() == EntityHuman.EnumChatVisibility.HIDDEN) { // CraftBukkit - dead men tell no tales
              ChatMessage chatmessage = new ChatMessage("chat.cannotSend", new Object[0]);
  
              chatmessage.getChatModifier().setColor(EnumChatFormat.RED);
              this.sendPacket(new PacketPlayOutChat(chatmessage));
          } else {
              this.player.resetIdleTimer();
              String s = packetplayinchat.a();
  
              s = StringUtils.normalizeSpace(s);
  
              for (int i = 0; i < s.length(); ++i) {
                  if (!SharedConstants.isAllowedChatCharacter(s.charAt(i))) {
                      // CraftBukkit start - threadsafety
                      if (!isSync) {
                          Waitable waitable = new Waitable() {
                              @Override
                              protected Object evaluate() {
                                  PlayerConnection.this.disconnect(new ChatMessage("multiplayer.disconnect.illegal_characters", new Object[0]));
                                  return null;
                              }
                          };
  
                          this.minecraftServer.processQueue.add(waitable);
  
                          try {
                              waitable.get();
                          } catch (InterruptedException e) {
                              Thread.currentThread().interrupt();
                          } catch (ExecutionException e) {
                              throw new RuntimeException(e);
                          }
                      } else {
                          this.disconnect(new ChatMessage("multiplayer.disconnect.illegal_characters", new Object[0]));
                      }
                      // CraftBukkit end
                      return;
                  }
              }
  
              // CraftBukkit start
              if (isSync) {
                  try {
                      this.minecraftServer.server.playerCommandState = true;
                      this.handleCommand(s);
                  } finally {
                      this.minecraftServer.server.playerCommandState = false;
                  }
              } else if (s.isEmpty()) {
                  LOGGER.warn(this.player.getName() + " tried to send an empty message");
              } else if (getPlayer().isConversing()) {
                  // Spigot start
                  final String message = s;
                  this.minecraftServer.processQueue.add( new Waitable()
                  {
                      @Override
                      protected Object evaluate()
                      {
                          getPlayer().acceptConversationInput( message );
                          return null;
                      }
                  } );
                  // Spigot end
              } else if (this.player.getChatFlags() == EntityHuman.EnumChatVisibility.SYSTEM) { // Re-add "Command Only" flag check
                  ChatMessage chatmessage = new ChatMessage("chat.cannotSend", new Object[0]);
  
                  chatmessage.getChatModifier().setColor(EnumChatFormat.RED);
                  this.sendPacket(new PacketPlayOutChat(chatmessage));
              } else if (true) {
                  this.chat(s, true);
                  // CraftBukkit end - the below is for reference. :)
              } else {
                  ChatMessage chatmessage1 = new ChatMessage("chat.type.text", new Object[] { this.player.getScoreboardDisplayName(), s});
  
                  this.minecraftServer.getPlayerList().sendMessage(chatmessage1, false);
              }
  
              // Spigot start - spam exclusions
              boolean counted = true;
              for ( String exclude : org.spigotmc.SpigotConfig.spamExclusions )
              {
                  if ( exclude != null && s.startsWith( exclude ) )
                  {
                      counted = false;
                      break;
                  }
              }
              // Spigot end
              // CraftBukkit start - replaced with thread safe throttle
              // this.chatThrottle += 20;
              if (counted && chatSpamField.addAndGet(this, 20) > 200 && !this.minecraftServer.getPlayerList().isOp(this.player.getProfile())) { // Spigot
                  if (!isSync) {
                      Waitable waitable = new Waitable() {
                          @Override
                          protected Object evaluate() {
                              PlayerConnection.this.disconnect(new ChatMessage("disconnect.spam", new Object[0]));
                              return null;
                          }
                      };
  
                      this.minecraftServer.processQueue.add(waitable);
  
                      try {
                          waitable.get();
                      } catch (InterruptedException e) {
                          Thread.currentThread().interrupt();
                      } catch (ExecutionException e) {
                          throw new RuntimeException(e);
                      }
                  } else {
                      this.disconnect(new ChatMessage("disconnect.spam", new Object[0]));
                  }
                  // CraftBukkit end
              }
  
          }
      }
  
      // CraftBukkit start - add method
      public void chat(String s, boolean async) {
          if (s.isEmpty() || this.player.getChatFlags() == EntityHuman.EnumChatVisibility.HIDDEN) {
              return;
          }
  
          if (!async && s.startsWith("/")) {
              // Paper Start
              if (!org.spigotmc.AsyncCatcher.shuttingDown && !Akari.isPrimaryThread()) { // Akarin
                  final String fCommandLine = s;
                  Akari.callbackQueue.add(() -> chat(fCommandLine,  false)); // Akarin
                  /* // Akarin
                  MinecraftServer.LOGGER.log(org.apache.logging.log4j.Level.ERROR, "Command Dispatched Async: " + fCommandLine);
                  MinecraftServer.LOGGER.log(org.apache.logging.log4j.Level.ERROR, "Please notify author of plugin causing this execution to fix this bug! see: http://bit.ly/1oSiM6C", new Throwable());
                  Waitable wait = new Waitable() {
                      @Override
                      protected Object evaluate() {
                          chat(fCommandLine, false);
                          return null;
                      }
                  };
                  minecraftServer.processQueue.add(wait);
                  try {
                      wait.get();
                      return;
                  } catch (InterruptedException e) {
                      Thread.currentThread().interrupt(); // This is proper habit for java. If we aren't handling it, pass it on!
                  } catch (Exception e) {
                      throw new RuntimeException("Exception processing chat command", e.getCause());
                  }
                  */ // Akarin
              }
              // Paper End
              this.handleCommand(s);
          } else if (this.player.getChatFlags() == EntityHuman.EnumChatVisibility.SYSTEM) {
              // Do nothing, this is coming from a plugin
          } else {
              Player player = this.getPlayer();
              AsyncPlayerChatEvent event = new AsyncPlayerChatEvent(async, player, s, new LazyPlayerSet(minecraftServer));
              this.server.getPluginManager().callEvent(event);
  
              if (PlayerChatEvent.getHandlerList().getRegisteredListeners().length != 0) {
                  // Evil plugins still listening to deprecated event
                  final PlayerChatEvent queueEvent = new PlayerChatEvent(player, event.getMessage(), event.getFormat(), event.getRecipients());
                  queueEvent.setCancelled(event.isCancelled());
                  Waitable waitable = new Waitable() {
                      @Override
                      protected Object evaluate() {
                          org.bukkit.Bukkit.getPluginManager().callEvent(queueEvent);
  
                          if (queueEvent.isCancelled()) {
                              return null;
                          }
  
                          String message = String.format(queueEvent.getFormat(), queueEvent.getPlayer().getDisplayName(), queueEvent.getMessage());
                          PlayerConnection.this.minecraftServer.console.sendMessage(message);
                          if (((LazyPlayerSet) queueEvent.getRecipients()).isLazy()) {
                              for (Object player : PlayerConnection.this.minecraftServer.getPlayerList().players) {
                                  ((EntityPlayer) player).sendMessage(CraftChatMessage.fromString(message));
                              }
                          } else {
                              for (Player player : queueEvent.getRecipients()) {
                                  player.sendMessage(message);
                              }
                          }
                          return null;
                      }};
                  if (async) {
                      minecraftServer.processQueue.add(waitable);
                  } else {
                      waitable.run();
                  }
                  try {
                      waitable.get();
                  } catch (InterruptedException e) {
                      Thread.currentThread().interrupt(); // This is proper habit for java. If we aren't handling it, pass it on!
                  } catch (ExecutionException e) {
                      throw new RuntimeException("Exception processing chat event", e.getCause());
                  }
              } else {
                  if (event.isCancelled()) {
                      return;
                  }
  
                  // Paper Start - (Meh) Support for vanilla world scoreboard name coloring
                  String displayName = event.getPlayer().getDisplayName();
                  if (this.player.getWorld().paperConfig.useVanillaScoreboardColoring) {
                      displayName = ScoreboardTeam.getPlayerDisplayName(this.player.getTeam(), player.getDisplayName());
                  }
  
                  s = String.format(event.getFormat(), displayName, event.getMessage());
                  // Paper end
                  minecraftServer.console.sendMessage(s);
                  if (((LazyPlayerSet) event.getRecipients()).isLazy()) {
                      for (Object recipient : minecraftServer.getPlayerList().players) {
                          ((EntityPlayer) recipient).sendMessage(CraftChatMessage.fromString(s));
                      }
                  } else {
                      for (Player recipient : event.getRecipients()) {
                          recipient.sendMessage(s);
                      }
                  }
              }
          }
      }
      // CraftBukkit end
  
      private void handleCommand(String s) {
          MinecraftTimings.playerCommandTimer.startTiming(); // Paper
         // CraftBukkit start - whole method
          if ( org.spigotmc.SpigotConfig.logCommands ) // Spigot
          this.LOGGER.info(this.player.getName() + " issued server command: " + s);
  
          CraftPlayer player = this.getPlayer();
  
          PlayerCommandPreprocessEvent event = new PlayerCommandPreprocessEvent(player, s, new LazyPlayerSet(minecraftServer));
          this.server.getPluginManager().callEvent(event);
  
          if (event.isCancelled()) {
              MinecraftTimings.playerCommandTimer.stopTiming(); // Paper
              return;
          }
  
          try {
              if (this.server.dispatchCommand(event.getPlayer(), event.getMessage().substring(1))) {
                  MinecraftTimings.playerCommandTimer.stopTiming(); // Paper
                  return;
              }
          } catch (org.bukkit.command.CommandException ex) {
              player.sendMessage(org.bukkit.ChatColor.RED + "An internal error occurred while attempting to perform this command");
              java.util.logging.Logger.getLogger(PlayerConnection.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
              MinecraftTimings.playerCommandTimer.stopTiming(); // Paper
              return;
          }
          MinecraftTimings.playerCommandTimer.stopTiming(); // Paper
          // this.minecraftServer.getCommandHandler().a(this.player, s);
          // CraftBukkit end
      }
  
      public void a(PacketPlayInArmAnimation packetplayinarmanimation) {
          PlayerConnectionUtils.ensureMainThread(packetplayinarmanimation, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          this.player.resetIdleTimer();
          // CraftBukkit start - Raytrace to look for 'rogue armswings'
          float f1 = this.player.pitch;
          float f2 = this.player.yaw;
          double d0 = this.player.locX;
          double d1 = this.player.locY + (double) this.player.getHeadHeight();
          double d2 = this.player.locZ;
          Vec3D vec3d = new Vec3D(d0, d1, d2);
  
          float f3 = MathHelper.cos(-f2 * 0.017453292F - 3.1415927F);
          float f4 = MathHelper.sin(-f2 * 0.017453292F - 3.1415927F);
          float f5 = -MathHelper.cos(-f1 * 0.017453292F);
          float f6 = MathHelper.sin(-f1 * 0.017453292F);
          float f7 = f4 * f5;
          float f8 = f3 * f5;
          double d3 = player.playerInteractManager.getGameMode()== EnumGamemode.CREATIVE ? 5.0D : 4.5D;
          Vec3D vec3d1 = vec3d.add((double) f7 * d3, (double) f6 * d3, (double) f8 * d3);
          MovingObjectPosition movingobjectposition = this.player.world.rayTrace(vec3d, vec3d1, false);
  
          if (movingobjectposition == null || movingobjectposition.type != MovingObjectPosition.EnumMovingObjectType.BLOCK) {
              CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_AIR, this.player.inventory.getItemInHand(), EnumHand.MAIN_HAND);
          }
  
          // Arm swing animation
          PlayerAnimationEvent event = new PlayerAnimationEvent(this.getPlayer());
          this.server.getPluginManager().callEvent(event);
  
          if (event.isCancelled()) return;
          // CraftBukkit end
          this.player.a(packetplayinarmanimation.a());
      }
  
      public void a(PacketPlayInEntityAction packetplayinentityaction) {
          PlayerConnectionUtils.ensureMainThread(packetplayinentityaction, this, this.player.x());
          // CraftBukkit start
          if (this.player.dead) return;
          switch (packetplayinentityaction.b()) {
              case START_SNEAKING:
              case STOP_SNEAKING:
                  PlayerToggleSneakEvent event = new PlayerToggleSneakEvent(this.getPlayer(), packetplayinentityaction.b() == PacketPlayInEntityAction.EnumPlayerAction.START_SNEAKING);
                  this.server.getPluginManager().callEvent(event);
  
                  if (event.isCancelled()) {
                      return;
                  }
                  break;
              case START_SPRINTING:
              case STOP_SPRINTING:
                  PlayerToggleSprintEvent e2 = new PlayerToggleSprintEvent(this.getPlayer(), packetplayinentityaction.b() == PacketPlayInEntityAction.EnumPlayerAction.START_SPRINTING);
                  this.server.getPluginManager().callEvent(e2);
  
                  if (e2.isCancelled()) {
                      return;
                  }
                  break;
          }
          // CraftBukkit end
          this.player.resetIdleTimer();
          IJumpable ijumpable;
  
          switch (packetplayinentityaction.b()) {
          case START_SNEAKING:
              this.player.setSneaking(true);
  
              // Paper start - Hang on!
              if (this.player.world.paperConfig.parrotsHangOnBetter) {
                  this.player.releaseShoulderEntities();
              }
              // Paper end
  
              break;
  
          case STOP_SNEAKING:
              this.player.setSneaking(false);
              break;
  
          case START_SPRINTING:
              this.player.setSprinting(true);
              break;
  
          case STOP_SPRINTING:
              this.player.setSprinting(false);
              break;
  
          case STOP_SLEEPING:
              if (this.player.isSleeping()) {
                  this.player.a(false, true, true);
                  this.teleportPos = new Vec3D(this.player.locX, this.player.locY, this.player.locZ);
              }
              break;
  
          case START_RIDING_JUMP:
              if (this.player.bJ() instanceof IJumpable) {
                  ijumpable = (IJumpable) this.player.bJ();
                  int i = packetplayinentityaction.c();
  
                  if (ijumpable.a() && i > 0) {
                      ijumpable.b_(i);
                  }
              }
              break;
  
          case STOP_RIDING_JUMP:
              if (this.player.bJ() instanceof IJumpable) {
                  ijumpable = (IJumpable) this.player.bJ();
                  ijumpable.r_();
              }
              break;
  
          case OPEN_INVENTORY:
              if (this.player.bJ() instanceof EntityHorseAbstract) {
                  ((EntityHorseAbstract) this.player.bJ()).c((EntityHuman) this.player);
              }
              break;
  
          case START_FALL_FLYING:
              if (!this.player.onGround && this.player.motY < 0.0D && !this.player.cP() && !this.player.isInWater()) {
                  ItemStack itemstack = this.player.getEquipment(EnumItemSlot.CHEST);
  
                  if (itemstack.getItem() == Items.cS && ItemElytra.d(itemstack)) {
                      this.player.N();
                  }
              } else {
                  this.player.O();
              }
              break;
  
          default:
              throw new IllegalArgumentException("Invalid client command!");
          }
  
      }
  
      public void a(PacketPlayInUseEntity packetplayinuseentity) {
          PlayerConnectionUtils.ensureMainThread(packetplayinuseentity, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);
          Entity entity = packetplayinuseentity.a((World) worldserver);
          // Spigot Start
          if ( entity == player && !player.isSpectator() )
          {
              disconnect( "Cannot interact with self!" );
              return;
          }
          // Spigot End
  
          this.player.resetIdleTimer();
          if (entity != null) {
              boolean flag = this.player.hasLineOfSight(entity);
              double d0 = 36.0D;
  
              if (!flag) {
                  d0 = 9.0D;
              }
  
              if (this.player.h(entity) < d0) {
                  EnumHand enumhand;
  
                  ItemStack itemInHand = this.player.b(packetplayinuseentity.b() == null ? EnumHand.MAIN_HAND : packetplayinuseentity.b()); // CraftBukkit
  
                  if (packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.INTERACT
                          || packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.INTERACT_AT) {
                      // CraftBukkit start
                      boolean triggerLeashUpdate = itemInHand != null && itemInHand.getItem() == Items.LEAD && entity instanceof EntityInsentient;
                      Item origItem = this.player.inventory.getItemInHand() == null ? null : this.player.inventory.getItemInHand().getItem();
                      PlayerInteractEntityEvent event;
                      if (packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.INTERACT) {
                          event = new PlayerInteractEntityEvent((Player) this.getPlayer(), entity.getBukkitEntity(), (packetplayinuseentity.b() == EnumHand.OFF_HAND) ? EquipmentSlot.OFF_HAND : EquipmentSlot.HAND);
                      } else {
                          Vec3D target = packetplayinuseentity.c();
                          event = new PlayerInteractAtEntityEvent((Player) this.getPlayer(), entity.getBukkitEntity(), new org.bukkit.util.Vector(target.x, target.y, target.z), (packetplayinuseentity.b() == EnumHand.OFF_HAND) ? EquipmentSlot.OFF_HAND : EquipmentSlot.HAND);
                      }
                      this.server.getPluginManager().callEvent(event);
  
                      if (triggerLeashUpdate && (event.isCancelled() || this.player.inventory.getItemInHand() == null || this.player.inventory.getItemInHand().getItem() != Items.LEAD)) {
                          // Refresh the current leash state
                          this.sendPacket(new PacketPlayOutAttachEntity(entity, ((EntityInsentient) entity).getLeashHolder()));
                      }
  
                      if (event.isCancelled() || this.player.inventory.getItemInHand() == null || this.player.inventory.getItemInHand().getItem() != origItem) {
                          // Refresh the current entity metadata
                          entity.tracker.broadcast(new PacketPlayOutEntityMetadata(entity.getId(), entity.datawatcher, true)); // Paper - update entity for all players
                      }
  
                      if (event.isCancelled()) {
                          this.player.updateInventory(this.player.activeContainer); // Paper - Refresh player inventory
                          return;
                      }
                      // CraftBukkit end
                  }
  
                  if (packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.INTERACT) {
                      enumhand = packetplayinuseentity.b();
                      this.player.a(entity, enumhand);
                      // CraftBukkit start
                      if (!itemInHand.isEmpty() && itemInHand.getCount() <= -1) {
                          this.player.updateInventory(this.player.activeContainer);
                      }
                      // CraftBukkit end
                  } else if (packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.INTERACT_AT) {
                      enumhand = packetplayinuseentity.b();
                      entity.a(this.player, packetplayinuseentity.c(), enumhand);
                      // CraftBukkit start
                      if (!itemInHand.isEmpty() && itemInHand.getCount() <= -1) {
                          this.player.updateInventory(this.player.activeContainer);
                      }
                      // CraftBukkit end
                  } else if (packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.ATTACK) {
                      if (entity instanceof EntityItem || entity instanceof EntityExperienceOrb || entity instanceof EntityArrow || (entity == this.player && !player.isSpectator())) { // CraftBukkit
                          this.disconnect(new ChatMessage("multiplayer.disconnect.invalid_entity_attacked", new Object[0]));
                          this.minecraftServer.warning("Player " + this.player.getName() + " tried to attack an invalid entity");
                          return;
                      }
  
                      this.player.attack(entity);
  
                      // CraftBukkit start
                      if (!itemInHand.isEmpty() && itemInHand.getCount() <= -1) {
                          this.player.updateInventory(this.player.activeContainer);
                      }
                      // CraftBukkit end
                  }
              }
          }
          // Paper start - fire event
          else {
              this.server.getPluginManager().callEvent(new com.destroystokyo.paper.event.player.PlayerUseUnknownEntityEvent(
                  this.getPlayer(),
                  packetplayinuseentity.getEntityId(),
                  packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.ATTACK,
                  packetplayinuseentity.b() == EnumHand.MAIN_HAND ? EquipmentSlot.HAND : EquipmentSlot.OFF_HAND
              ));
          }
          // Paper end
  
      }
  
      public void a(PacketPlayInClientCommand packetplayinclientcommand) {
          PlayerConnectionUtils.ensureMainThread(packetplayinclientcommand, this, this.player.x());
          this.player.resetIdleTimer();
          PacketPlayInClientCommand.EnumClientCommand packetplayinclientcommand_enumclientcommand = packetplayinclientcommand.a();
  
          switch (packetplayinclientcommand_enumclientcommand) {
          case PERFORM_RESPAWN:
              if (this.player.viewingCredits) {
                  this.player.viewingCredits = false;
                  // this.player = this.minecraftServer.getPlayerList().moveToWorld(this.player, 0, true);
                  this.minecraftServer.getPlayerList().changeDimension(this.player, 0, PlayerTeleportEvent.TeleportCause.END_PORTAL); // CraftBukkit - reroute logic through custom portal management
                  CriterionTriggers.u.a(this.player, DimensionManager.THE_END, DimensionManager.OVERWORLD);
              } else {
                  if (this.player.getHealth() > 0.0F) {
                      return;
                  }
  
                  this.player = this.minecraftServer.getPlayerList().moveToWorld(this.player, 0, false);
                  if (this.minecraftServer.isHardcore()) {
                      this.player.a(EnumGamemode.SPECTATOR);
                      this.player.x().getGameRules().set("spectatorsGenerateChunks", "false");
                  }
              }
              break;
  
          case REQUEST_STATS:
              this.player.getStatisticManager().a(this.player);
          }
  
      }
  
      public void a(PacketPlayInCloseWindow packetplayinclosewindow) {
          PlayerConnectionUtils.ensureMainThread(packetplayinclosewindow, this, this.player.x());
  
          if (this.player.isFrozen()) return; // CraftBukkit
          CraftEventFactory.handleInventoryCloseEvent(this.player, org.bukkit.event.inventory.InventoryCloseEvent.Reason.PLAYER); // CraftBukkit // Paper
  
          this.player.r();
      }
  
      public void a(PacketPlayInWindowClick packetplayinwindowclick) {
          PlayerConnectionUtils.ensureMainThread(packetplayinwindowclick, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          this.player.resetIdleTimer();
          if (this.player.activeContainer.windowId == packetplayinwindowclick.a() && this.player.activeContainer.c(this.player) && this.player.activeContainer.canUse(this.player)) { // CraftBukkit
              boolean cancelled = this.player.isSpectator(); // CraftBukkit - see below if
              if (false/*this.player.isSpectator()*/) { // CraftBukkit
                  NonNullList nonnulllist = NonNullList.a();
  
                  for (int i = 0; i < this.player.activeContainer.slots.size(); ++i) {
                      nonnulllist.add(((Slot) this.player.activeContainer.slots.get(i)).getItem());
                  }
  
                  this.player.a(this.player.activeContainer, nonnulllist);
              } else {
                  // CraftBukkit start - Call InventoryClickEvent
                  if (packetplayinwindowclick.b() < -1 && packetplayinwindowclick.b() != -999) {
                      return;
                  }
  
                  InventoryView inventory = this.player.activeContainer.getBukkitView();
                  SlotType type = CraftInventoryView.getSlotType(inventory, packetplayinwindowclick.b());
  
                  InventoryClickEvent event;
                  ClickType click = ClickType.UNKNOWN;
                  InventoryAction action = InventoryAction.UNKNOWN;
  
                  ItemStack itemstack = ItemStack.a;
  
                  switch (packetplayinwindowclick.f()) {
                      case PICKUP:
                          if (packetplayinwindowclick.c() == 0) {
                              click = ClickType.LEFT;
                          } else if (packetplayinwindowclick.c() == 1) {
                              click = ClickType.RIGHT;
                          }
                          if (packetplayinwindowclick.c() == 0 || packetplayinwindowclick.c() == 1) {
                              action = InventoryAction.NOTHING; // Don't want to repeat ourselves
                              if (packetplayinwindowclick.b() == -999) {
                                  if (!player.inventory.getCarried().isEmpty()) {
                                      action = packetplayinwindowclick.c() == 0 ? InventoryAction.DROP_ALL_CURSOR : InventoryAction.DROP_ONE_CURSOR;
                                  }
                              } else if (packetplayinwindowclick.b() < 0)  {
                                  action = InventoryAction.NOTHING;
                              } else {
                                  Slot slot = this.player.activeContainer.getSlot(packetplayinwindowclick.b());
                                  if (slot != null) {
                                      ItemStack clickedItem = slot.getItem();
                                      ItemStack cursor = player.inventory.getCarried();
                                      if (clickedItem.isEmpty()) {
                                          if (!cursor.isEmpty()) {
                                              action = packetplayinwindowclick.c() == 0 ? InventoryAction.PLACE_ALL : InventoryAction.PLACE_ONE;
                                          }
                                      } else if (slot.isAllowed(player)) {
                                          if (cursor.isEmpty()) {
                                              action = packetplayinwindowclick.c() == 0 ? InventoryAction.PICKUP_ALL : InventoryAction.PICKUP_HALF;
                                          } else if (slot.isAllowed(cursor)) {
                                              if (clickedItem.doMaterialsMatch(cursor) && ItemStack.equals(clickedItem, cursor)) {
                                                  int toPlace = packetplayinwindowclick.c() == 0 ? cursor.getCount() : 1;
                                                  toPlace = Math.min(toPlace, clickedItem.getMaxStackSize() - clickedItem.getCount());
                                                  toPlace = Math.min(toPlace, slot.inventory.getMaxStackSize() - clickedItem.getCount());
                                                  if (toPlace == 1) {
                                                      action = InventoryAction.PLACE_ONE;
                                                  } else if (toPlace == cursor.getCount()) {
                                                      action = InventoryAction.PLACE_ALL;
                                                  } else if (toPlace < 0) {
                                                      action = toPlace != -1 ? InventoryAction.PICKUP_SOME : InventoryAction.PICKUP_ONE; // this happens with oversized stacks
                                                  } else if (toPlace != 0) {
                                                      action = InventoryAction.PLACE_SOME;
                                                  }
                                              } else if (cursor.getCount() <= slot.getMaxStackSize()) {
                                                  action = InventoryAction.SWAP_WITH_CURSOR;
                                              }
                                          } else if (cursor.getItem() == clickedItem.getItem() && (!cursor.usesData() || cursor.getData() == clickedItem.getData()) && ItemStack.equals(cursor, clickedItem)) {
                                              if (clickedItem.getCount() >= 0) {
                                                  if (clickedItem.getCount() + cursor.getCount() <= cursor.getMaxStackSize()) {
                                                      // As of 1.5, this is result slots only
                                                      action = InventoryAction.PICKUP_ALL;
                                                  }
                                              }
                                          }
                                      }
                                  }
                              }
                          }
                          break;
                      // TODO check on updates
                      case QUICK_MOVE:
                          if (packetplayinwindowclick.c() == 0) {
                              click = ClickType.SHIFT_LEFT;
                          } else if (packetplayinwindowclick.c() == 1) {
                              click = ClickType.SHIFT_RIGHT;
                          }
                          if (packetplayinwindowclick.c() == 0 || packetplayinwindowclick.c() == 1) {
                              if (packetplayinwindowclick.b() < 0) {
                                  action = InventoryAction.NOTHING;
                              } else {
                                  Slot slot = this.player.activeContainer.getSlot(packetplayinwindowclick.b());
                                  if (slot != null && slot.isAllowed(this.player) && slot.hasItem()) {
                                      action = InventoryAction.MOVE_TO_OTHER_INVENTORY;
                                  } else {
                                      action = InventoryAction.NOTHING;
                                  }
                              }
                          }
                          break;
                      case SWAP:
                          if (packetplayinwindowclick.c() >= 0 && packetplayinwindowclick.c() < 9) {
                              click = ClickType.NUMBER_KEY;
                              Slot clickedSlot = this.player.activeContainer.getSlot(packetplayinwindowclick.b());
                              if (clickedSlot.isAllowed(player)) {
                                  ItemStack hotbar = this.player.inventory.getItem(packetplayinwindowclick.c());
                                  boolean canCleanSwap = hotbar.isEmpty() || (clickedSlot.inventory == player.inventory && clickedSlot.isAllowed(hotbar)); // the slot will accept the hotbar item
                                  if (clickedSlot.hasItem()) {
                                      if (canCleanSwap) {
                                          action = InventoryAction.HOTBAR_SWAP;
                                      } else {
                                          action = InventoryAction.HOTBAR_MOVE_AND_READD;
                                      }
                                  } else if (!clickedSlot.hasItem() && !hotbar.isEmpty() && clickedSlot.isAllowed(hotbar)) {
                                      action = InventoryAction.HOTBAR_SWAP;
                                  } else {
                                      action = InventoryAction.NOTHING;
                                  }
                              } else {
                                  action = InventoryAction.NOTHING;
                              }
                          }
                          break;
                      case CLONE:
                          if (packetplayinwindowclick.c() == 2) {
                              click = ClickType.MIDDLE;
                              if (packetplayinwindowclick.b() < 0) { // Paper - GH-404
                                  action = InventoryAction.NOTHING;
                              } else {
                                  Slot slot = this.player.activeContainer.getSlot(packetplayinwindowclick.b());
                                  if (slot != null && slot.hasItem() && player.abilities.canInstantlyBuild && player.inventory.getCarried().isEmpty()) {
                                      action = InventoryAction.CLONE_STACK;
                                  } else {
                                      action = InventoryAction.NOTHING;
                                  }
                              }
                          } else {
                              click = ClickType.UNKNOWN;
                              action = InventoryAction.UNKNOWN;
                          }
                          break;
                      case THROW:
                          if (packetplayinwindowclick.b() >= 0) {
                              if (packetplayinwindowclick.c() == 0) {
                                  click = ClickType.DROP;
                                  Slot slot = this.player.activeContainer.getSlot(packetplayinwindowclick.b());
                                  if (slot != null && slot.hasItem() && slot.isAllowed(player) && !slot.getItem().isEmpty() && slot.getItem().getItem() != Item.getItemOf(Blocks.AIR)) {
                                      action = InventoryAction.DROP_ONE_SLOT;
                                  } else {
                                      action = InventoryAction.NOTHING;
                                  }
                              } else if (packetplayinwindowclick.c() == 1) {
                                  click = ClickType.CONTROL_DROP;
                                  Slot slot = this.player.activeContainer.getSlot(packetplayinwindowclick.b());
                                  if (slot != null && slot.hasItem() && slot.isAllowed(player) && !slot.getItem().isEmpty() && slot.getItem().getItem() != Item.getItemOf(Blocks.AIR)) {
                                      action = InventoryAction.DROP_ALL_SLOT;
                                  } else {
                                      action = InventoryAction.NOTHING;
                                  }
                              }
                          } else {
                              // Sane default (because this happens when they are holding nothing. Don't ask why.)
                              click = ClickType.LEFT;
                              if (packetplayinwindowclick.c() == 1) {
                                  click = ClickType.RIGHT;
                              }
                              action = InventoryAction.NOTHING;
                          }
                          break;
                      case QUICK_CRAFT:
                          itemstack = this.player.activeContainer.a(packetplayinwindowclick.b(), packetplayinwindowclick.c(), packetplayinwindowclick.f(), this.player);
                          break;
                      case PICKUP_ALL:
                          click = ClickType.DOUBLE_CLICK;
                          action = InventoryAction.NOTHING;
                          if (packetplayinwindowclick.b() >= 0 && !this.player.inventory.getCarried().isEmpty()) {
                              ItemStack cursor = this.player.inventory.getCarried();
                              action = InventoryAction.NOTHING;
                              // Quick check for if we have any of the item
                              if (inventory.getTopInventory().contains(org.bukkit.Material.getMaterial(Item.getId(cursor.getItem()))) || inventory.getBottomInventory().contains(org.bukkit.Material.getMaterial(Item.getId(cursor.getItem())))) {
                                  action = InventoryAction.COLLECT_TO_CURSOR;
                              }
                          }
                          break;
                      default:
                          break;
                  }
  
                  if (packetplayinwindowclick.f() != InventoryClickType.QUICK_CRAFT) {
                      if (click == ClickType.NUMBER_KEY) {
                          event = new InventoryClickEvent(inventory, type, packetplayinwindowclick.b(), click, action, packetplayinwindowclick.c());
                      } else {
                          event = new InventoryClickEvent(inventory, type, packetplayinwindowclick.b(), click, action);
                      }
  
                      org.bukkit.inventory.Inventory top = inventory.getTopInventory();
                      if (packetplayinwindowclick.b() == 0 && top instanceof CraftingInventory) {
                          org.bukkit.inventory.Recipe recipe = ((CraftingInventory) top).getRecipe();
                          if (recipe != null) {
                              if (click == ClickType.NUMBER_KEY) {
                                  event = new CraftItemEvent(recipe, inventory, type, packetplayinwindowclick.b(), click, action, packetplayinwindowclick.c());
                              } else {
                                  event = new CraftItemEvent(recipe, inventory, type, packetplayinwindowclick.b(), click, action);
                              }
                          }
                      }
  
                      event.setCancelled(cancelled);
                      Container oldContainer = this.player.activeContainer; // SPIGOT-1224
                      server.getPluginManager().callEvent(event);
                      if (this.player.activeContainer != oldContainer) {
                          return;
                      }
  
                      switch (event.getResult()) {
                          case ALLOW:
                          case DEFAULT:
                              itemstack = this.player.activeContainer.a(packetplayinwindowclick.b(), packetplayinwindowclick.c(), packetplayinwindowclick.f(), this.player);
                              break;
                          case DENY:
                              /* Needs enum constructor in InventoryAction
                              if (action.modifiesOtherSlots()) {
  
                              } else {
                                  if (action.modifiesCursor()) {
                                      this.player.playerConnection.sendPacket(new Packet103SetSlot(-1, -1, this.player.inventory.getCarried()));
                                  }
                                  if (action.modifiesClicked()) {
                                      this.player.playerConnection.sendPacket(new Packet103SetSlot(this.player.activeContainer.windowId, packet102windowclick.slot, this.player.activeContainer.getSlot(packet102windowclick.slot).getItem()));
                                  }
                              }*/
                              switch (action) {
                                  // Modified other slots
                                  case PICKUP_ALL:
                                  case MOVE_TO_OTHER_INVENTORY:
                                  case HOTBAR_MOVE_AND_READD:
                                  case HOTBAR_SWAP:
                                  case COLLECT_TO_CURSOR:
                                  case UNKNOWN:
                                      this.player.updateInventory(this.player.activeContainer);
                                      break;
                                  // Modified cursor and clicked
                                  case PICKUP_SOME:
                                  case PICKUP_HALF:
                                  case PICKUP_ONE:
                                  case PLACE_ALL:
                                  case PLACE_SOME:
                                  case PLACE_ONE:
                                  case SWAP_WITH_CURSOR:
                                      this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-1, -1, this.player.inventory.getCarried()));
                                      this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(this.player.activeContainer.windowId, packetplayinwindowclick.b(), this.player.activeContainer.getSlot(packetplayinwindowclick.b()).getItem()));
                                      break;
                                  // Modified clicked only
                                  case DROP_ALL_SLOT:
                                  case DROP_ONE_SLOT:
                                      this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(this.player.activeContainer.windowId, packetplayinwindowclick.b(), this.player.activeContainer.getSlot(packetplayinwindowclick.b()).getItem()));
                                      break;
                                  // Modified cursor only
                                  case DROP_ALL_CURSOR:
                                  case DROP_ONE_CURSOR:
                                  case CLONE_STACK:
                                      this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-1, -1, this.player.inventory.getCarried()));
                                      break;
                                  // Nothing
                                  case NOTHING:
                                      break;
                              }
                              return;
                      }
  
                      if (event instanceof CraftItemEvent) {
                          // Need to update the inventory on crafting to
                          // correctly support custom recipes
                          player.updateInventory(player.activeContainer);
                      }
                  }
                  // CraftBukkit end
                  if (ItemStack.matches(packetplayinwindowclick.e(), itemstack)) {
                      this.player.playerConnection.sendPacket(new PacketPlayOutTransaction(packetplayinwindowclick.a(), packetplayinwindowclick.d(), true));
                      this.player.f = true;
                      this.player.activeContainer.b();
                      this.player.broadcastCarriedItem();
                      this.player.f = false;
                  } else {
                      this.k.a(this.player.activeContainer.windowId, Short.valueOf(packetplayinwindowclick.d()));
                      this.player.playerConnection.sendPacket(new PacketPlayOutTransaction(packetplayinwindowclick.a(), packetplayinwindowclick.d(), false));
                      this.player.activeContainer.a(this.player, false);
                      NonNullList nonnulllist1 = NonNullList.a();
  
                      for (int j = 0; j < this.player.activeContainer.slots.size(); ++j) {
                          ItemStack itemstack1 = ((Slot) this.player.activeContainer.slots.get(j)).getItem();
                          ItemStack itemstack2 = itemstack1.isEmpty() ? ItemStack.a : itemstack1;
  
                          nonnulllist1.add(itemstack2);
                      }
  
                      this.player.a(this.player.activeContainer, nonnulllist1);
                  }
              }
          }
  
      }
  
      public void a(PacketPlayInAutoRecipe packetplayinautorecipe) {
          PlayerConnectionUtils.ensureMainThread(packetplayinautorecipe, this, this.player.x());
          this.player.resetIdleTimer();
          if (!this.player.isSpectator() && this.player.activeContainer.windowId == packetplayinautorecipe.a() && this.player.activeContainer.c(this.player)) {
              this.H.a(this.player, packetplayinautorecipe.b(), packetplayinautorecipe.c());
          }
      }
  
      public void a(PacketPlayInEnchantItem packetplayinenchantitem) {
          PlayerConnectionUtils.ensureMainThread(packetplayinenchantitem, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          this.player.resetIdleTimer();
          if (this.player.activeContainer.windowId == packetplayinenchantitem.a() && this.player.activeContainer.c(this.player) && !this.player.isSpectator()) {
              this.player.activeContainer.a(this.player, packetplayinenchantitem.b());
              this.player.activeContainer.b();
          }
  
      }
  
      public void a(PacketPlayInSetCreativeSlot packetplayinsetcreativeslot) {
          PlayerConnectionUtils.ensureMainThread(packetplayinsetcreativeslot, this, this.player.x());
          if (this.player.playerInteractManager.isCreative()) {
              boolean flag = packetplayinsetcreativeslot.a() < 0;
              ItemStack itemstack = packetplayinsetcreativeslot.getItemStack();
  
              if (!itemstack.isEmpty() && itemstack.hasTag() && itemstack.getTag().hasKeyOfType("BlockEntityTag", 10)) {
                  NBTTagCompound nbttagcompound = itemstack.getTag().getCompound("BlockEntityTag");
  
                  if (nbttagcompound.hasKey("x") && nbttagcompound.hasKey("y") && nbttagcompound.hasKey("z")) {
                      BlockPosition blockposition = new BlockPosition(nbttagcompound.getInt("x"), nbttagcompound.getInt("y"), nbttagcompound.getInt("z"));
                      TileEntity tileentity = this.player.world.getTileEntity(blockposition);
  
                      if (tileentity != null) {
                          NBTTagCompound nbttagcompound1 = tileentity.save(new NBTTagCompound());
  
                          nbttagcompound1.remove("x");
                          nbttagcompound1.remove("y");
                          nbttagcompound1.remove("z");
                          itemstack.a("BlockEntityTag", (NBTBase) nbttagcompound1);
                      }
                  }
              }
  
              boolean flag1 = packetplayinsetcreativeslot.a() >= 1 && packetplayinsetcreativeslot.a() <= 45;
              // CraftBukkit - Add invalidItems check
              boolean flag2 = itemstack.isEmpty() || itemstack.getData() >= 0 && itemstack.getCount() <= 64 && !itemstack.isEmpty() && (!invalidItems.contains(Item.getId(itemstack.getItem())) || !org.spigotmc.SpigotConfig.filterCreativeItems); // Spigot
              if (flag || (flag1 && !ItemStack.matches(this.player.defaultContainer.getSlot(packetplayinsetcreativeslot.a()).getItem(), packetplayinsetcreativeslot.getItemStack()))) { // Insist on valid slot
                  // CraftBukkit start - Call click event
                  InventoryView inventory = this.player.defaultContainer.getBukkitView();
                  org.bukkit.inventory.ItemStack item = CraftItemStack.asBukkitCopy(packetplayinsetcreativeslot.getItemStack());
  
                  SlotType type = SlotType.QUICKBAR;
                  if (flag) {
                      type = SlotType.OUTSIDE;
                  } else if (packetplayinsetcreativeslot.a() < 36) {
                      if (packetplayinsetcreativeslot.a() >= 5 && packetplayinsetcreativeslot.a() < 9) {
                          type = SlotType.ARMOR;
                      } else {
                          type = SlotType.CONTAINER;
                      }
                  }
                  InventoryCreativeEvent event = new InventoryCreativeEvent(inventory, type, flag ? -999 : packetplayinsetcreativeslot.a(), item);
                  server.getPluginManager().callEvent(event);
  
                  itemstack = CraftItemStack.asNMSCopy(event.getCursor());
  
                  switch (event.getResult()) {
                  case ALLOW:
                      // Plugin cleared the id / stacksize checks
                      flag2 = true;
                      break;
                  case DEFAULT:
                      break;
                  case DENY:
                      // Reset the slot
                      if (packetplayinsetcreativeslot.a() >= 0) {
                          this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(this.player.defaultContainer.windowId, packetplayinsetcreativeslot.a(), this.player.defaultContainer.getSlot(packetplayinsetcreativeslot.a()).getItem()));
                          this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-1, -1, ItemStack.a));
                      }
                      return;
                  }
              }
              // CraftBukkit end
  
              if (flag1 && flag2) {
                  if (itemstack.isEmpty()) {
                      this.player.defaultContainer.setItem(packetplayinsetcreativeslot.a(), ItemStack.a);
                  } else {
                      this.player.defaultContainer.setItem(packetplayinsetcreativeslot.a(), itemstack);
                  }
  
                  this.player.defaultContainer.a(this.player, true);
              } else if (flag && flag2 && this.j < 200) {
                  this.j += 20;
                  EntityItem entityitem = this.player.drop(itemstack, true);
  
                  if (entityitem != null) {
                      entityitem.j();
                  }
              }
          }
  
      }
  
      public void a(PacketPlayInTransaction packetplayintransaction) {
          PlayerConnectionUtils.ensureMainThread(packetplayintransaction, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          Short oshort = (Short) this.k.get(this.player.activeContainer.windowId);
  
          if (oshort != null && packetplayintransaction.b() == oshort.shortValue() && this.player.activeContainer.windowId == packetplayintransaction.a() && !this.player.activeContainer.c(this.player) && !this.player.isSpectator()) {
              this.player.activeContainer.a(this.player, true);
          }
  
      }
  
      public void a(PacketPlayInUpdateSign packetplayinupdatesign) {
          PlayerConnectionUtils.ensureMainThread(packetplayinupdatesign, this, this.player.x());
          if (this.player.isFrozen()) return; // CraftBukkit
          this.player.resetIdleTimer();
          WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);
          BlockPosition blockposition = packetplayinupdatesign.a();
  
          if (worldserver.isLoaded(blockposition)) {
              IBlockData iblockdata = worldserver.getType(blockposition);
              TileEntity tileentity = worldserver.getTileEntity(blockposition);
  
              if (!(tileentity instanceof TileEntitySign)) {
                  return;
              }
  
              TileEntitySign tileentitysign = (TileEntitySign) tileentity;
  
              if (!tileentitysign.a() || tileentitysign.signEditor == null || !tileentitysign.signEditor.equals(this.player.getUniqueID())) { // Paper
                  this.minecraftServer.warning("Player " + this.player.getName() + " just tried to change non-editable sign");
                  this.sendPacket(tileentity.getUpdatePacket()); // CraftBukkit
                  return;
              }
  
              String[] astring = packetplayinupdatesign.b();
  
              // CraftBukkit start
              Player player = this.server.getPlayer(this.player);
              int x = packetplayinupdatesign.a().getX();
              int y = packetplayinupdatesign.a().getY();
              int z = packetplayinupdatesign.a().getZ();
              String[] lines = new String[4];
  
              for (int i = 0; i < astring.length; ++i) {
                  // Paper start - cap line length - modified clients can send longer data than normal
                  if (astring[i].length() > TileEntitySign.MAX_SIGN_LINE_LENGTH && TileEntitySign.MAX_SIGN_LINE_LENGTH > 0) {
                      int offset = astring[i].codePoints().limit(TileEntitySign.MAX_SIGN_LINE_LENGTH).map(Character::charCount).sum();
                      if (offset > astring.length) {
                          astring[i] = astring[i].substring(0, offset);
                      }
                  }
                  // Paper end
                  lines[i] = SharedConstants.a(astring[i]); //Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
              }
              SignChangeEvent event = new SignChangeEvent((org.bukkit.craftbukkit.block.CraftBlock) player.getWorld().getBlockAt(x, y, z), this.server.getPlayer(this.player), lines);
              this.server.getPluginManager().callEvent(event);
  
              if (!event.isCancelled()) {
                  System.arraycopy(org.bukkit.craftbukkit.block.CraftSign.sanitizeLines(event.getLines()), 0, tileentitysign.lines, 0, 4);
                  tileentitysign.isEditable = false;
               }
              // CraftBukkit end
  
              tileentitysign.update();
              worldserver.notify(blockposition, iblockdata, iblockdata, 3);
          }
  
      }
  
      public void a(PacketPlayInKeepAlive packetplayinkeepalive) {
          //PlayerConnectionUtils.ensureMainThread(packetplayinkeepalive, this, this.player.x()); // CraftBukkit // Paper - This shouldn't be on the main thread
          if (this.g && packetplayinkeepalive.a() == this.h) {
              int i = (int) (this.d() - this.f);
  
              this.player.ping = (this.player.ping * 3 + i) / 4;
              this.g = false;
          } else if (!this.player.getName().equals(this.minecraftServer.Q())) {
              // Paper start - This needs to be handled on the main thread for plugins
              PlayerConnection.LOGGER.warn("{} sent an invalid keepalive! pending keepalive: {} got id: {} expected id: {}",
                      this.player.getName(), this.isPendingPing(), packetplayinkeepalive.a(), this.getKeepAliveID());
              minecraftServer.postToMainThread(() -> {
                      this.disconnect(new ChatMessage("disconnect.timeout", new Object[0]));
              });
              // Paper end
          }
  
      }
  
      private long getCurrentMillis() { return d(); } // Paper - OBFHELPER
      private long d() {
          return System.nanoTime() / 1000000L;
      }
  
      public void a(PacketPlayInAbilities packetplayinabilities) {
          PlayerConnectionUtils.ensureMainThread(packetplayinabilities, this, this.player.x());
          // CraftBukkit start
          if (this.player.abilities.canFly && this.player.abilities.isFlying != packetplayinabilities.isFlying()) {
              PlayerToggleFlightEvent event = new PlayerToggleFlightEvent(this.server.getPlayer(this.player), packetplayinabilities.isFlying());
              this.server.getPluginManager().callEvent(event);
              if (!event.isCancelled()) {
                  this.player.abilities.isFlying = packetplayinabilities.isFlying(); // Actually set the player's flying status
              } else {
                  this.player.updateAbilities(); // Tell the player their ability was reverted
              }
          }
          // CraftBukkit end
      }
  
      // Paper start - async tab completion
      public void a(PacketPlayInTabComplete packet) {
          // CraftBukkit start
          if (tabSpamLimiter.addAndGet(com.destroystokyo.paper.PaperConfig.tabSpamIncrement) > com.destroystokyo.paper.PaperConfig.tabSpamLimit && !this.minecraftServer.getPlayerList().isOp(this.player.getProfile())) { // Paper start - split and make configurable
              minecraftServer.postToMainThread(() -> this.disconnect(new ChatMessage("disconnect.spam", new Object[0])));
              return;
          }
          // CraftBukkit end
  
          com.destroystokyo.paper.event.server.AsyncTabCompleteEvent event;
          java.util.List<String> completions = new ArrayList<>();
          BlockPosition blockpos = packet.b();
          String buffer = packet.a();
          boolean isCommand = buffer.startsWith("/") || packet.c();
          event = new com.destroystokyo.paper.event.server.AsyncTabCompleteEvent(this.getPlayer(), completions,
              buffer, isCommand, blockpos != null ? MCUtil.toLocation(player.world, blockpos) : null);
          event.callEvent();
          completions = event.isCancelled() ? com.google.common.collect.ImmutableList.of() : event.getCompletions();
          if (!event.isHandled()) {
              // If the event isn't handled, we can assume that we have no completions, and so we'll ask the server
  
              Waitable<java.util.List<String>> syncCompletions = new Waitable<java.util.List<String>>() {
                  @Override
                  protected java.util.List<String> evaluate() {
                      return minecraftServer.tabCompleteCommand(player, buffer, blockpos, isCommand);
                  }
              };
              server.getServer().processQueue.add(syncCompletions);
              try {
                  completions = syncCompletions.get();
              } catch (InterruptedException | ExecutionException e1) {
                  e1.printStackTrace();
              }
  
              this.player.playerConnection.sendPacket(new PacketPlayOutTabComplete(completions.toArray(new String[completions.size()])));
          } else if (!event.isCancelled()) {
              this.player.playerConnection.sendPacket(new PacketPlayOutTabComplete(completions.toArray(new String[completions.size()])));
          }
          // Paper end
      }
  
      public void a(PacketPlayInSettings packetplayinsettings) {
          PlayerConnectionUtils.ensureMainThread(packetplayinsettings, this, this.player.x());
          this.player.a(packetplayinsettings);
      }
  
      // Paper start
      private boolean validateBook(ItemStack testStack) {
          NBTTagList pageList = testStack.getTag().getList("pages", 8);
          long byteTotal = 0;
          int maxBookPageSize = com.destroystokyo.paper.PaperConfig.maxBookPageSize;
          double multiplier = Math.max(0.3D, Math.min(1D, com.destroystokyo.paper.PaperConfig.maxBookTotalSizeMultiplier));
          long byteAllowed = maxBookPageSize;
          for (int i = 0; i < pageList.size(); ++i) {
              String testString = pageList.getString(i);
              int byteLength = testString.getBytes(java.nio.charset.StandardCharsets.UTF_8).length;
              byteTotal += byteLength;
  
              int length = testString.length();
              int multibytes = 0;
              if (length != byteLength) {
                  for (char c : testString.toCharArray()) {
                      if (c > 127) {
                          multibytes++;
                      }
                  }
              }
              byteAllowed += (maxBookPageSize * Math.min(1, Math.max(0.1D, (double) length / 255D))) * multiplier;
  
              if (multibytes > 1) {
                  // penalize MB
                  byteAllowed -= multibytes;
              }
          }
  
          if (byteTotal > byteAllowed) {
              PlayerConnection.LOGGER.warn(this.player.getName() + " tried to send too large of a book. Book Size: " + byteTotal + " - Allowed:  "+ byteAllowed + " - Pages: " + pageList.size());
              minecraftServer.postToMainThread(() -> this.disconnect("Book too large!"));
              return false;
          }
  
          return true;
      }
      // Paper end
  
      public void a(PacketPlayInCustomPayload packetplayincustompayload) {
          PlayerConnectionUtils.ensureMainThread(packetplayincustompayload, this, this.player.x());
          String s = packetplayincustompayload.a();
          PacketDataSerializer packetdataserializer;
          ItemStack itemstack;
          ItemStack itemstack1;
  
          if ("MC|BEdit".equals(s)) {
              // CraftBukkit start
              if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
                  this.disconnect("Book edited too quickly!");
                  return;
              }
              this.lastBookTick = MinecraftServer.currentTick;
              // CraftBukkit end
              packetdataserializer = packetplayincustompayload.b();
  
              try {
                  itemstack = packetdataserializer.k();
                  if (itemstack.isEmpty()) {
                      return;
                  }
  
                  if (!ItemBookAndQuill.b(itemstack.getTag())) {
                      throw new IOException("Invalid book tag!");
                  }
  
                  itemstack1 = this.player.getItemInMainHand();
                  if (itemstack1.isEmpty()) {
                      return;
                  }
  
                  if (itemstack.getItem() == Items.WRITABLE_BOOK && itemstack.getItem() == itemstack1.getItem()) {
                      if (!validateBook(itemstack)) return; // Paper
                      itemstack1.a("pages", (NBTBase) itemstack.getTag().getList("pages", 8));
                      CraftEventFactory.handleEditBookEvent(player, itemstack1); // CraftBukkit
                  }
              } catch (Exception exception) {
                  IllegalPacketEvent.process(player.getBukkitEntity(), "InvalidBookEdit", "Invalid book data!", exception); // Paper
              }
          } else {
              String s1;
  
              if ("MC|BSign".equals(s)) {
                  // CraftBukkit start
                  if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
                      this.disconnect("Book edited too quickly!");
                      return;
                  }
                  this.lastBookTick = MinecraftServer.currentTick;
                  // CraftBukkit end
                  packetdataserializer = packetplayincustompayload.b();
  
                  try {
                      itemstack = packetdataserializer.k();
                      if (itemstack.isEmpty()) {
                          return;
                      }
  
                      if (!ItemWrittenBook.b(itemstack.getTag())) {
                          throw new IOException("Invalid book tag!");
                      }
  
                      itemstack1 = this.player.getItemInMainHand();
                      if (itemstack1.isEmpty()) {
                          return;
                      }
  
                      if (itemstack.getItem() == Items.WRITABLE_BOOK && itemstack1.getItem() == Items.WRITABLE_BOOK) {
                          if (!validateBook(itemstack)) return; // Paper
                          ItemStack itemstack2 = new ItemStack(Items.WRITTEN_BOOK);
  
                          itemstack2.a("author", (NBTBase) (new NBTTagString(this.player.getName())));
                          itemstack2.a("title", (NBTBase) (new NBTTagString(itemstack.getTag().getString("title"))));
                          NBTTagList nbttaglist = itemstack.getTag().getList("pages", 8);
  
                          for (int i = 0; i < nbttaglist.size(); ++i) {
                              s1 = nbttaglist.getString(i);
                              ChatComponentText chatcomponenttext = new ChatComponentText(s1);
  
                              s1 = IChatBaseComponent.ChatSerializer.a((IChatBaseComponent) chatcomponenttext);
                              nbttaglist.a(i, new NBTTagString(s1));
                          }
  
                          itemstack2.a("pages", (NBTBase) nbttaglist);
                          CraftEventFactory.handleEditBookEvent(player, itemstack2); // CraftBukkit
                      }
                  } catch (Exception exception1) {
                      IllegalPacketEvent.process(player.getBukkitEntity(), "InvalidBookSign", "Invalid book data!", exception1); // Paper
                  }
              } else if ("MC|TrSel".equals(s)) {
                  try {
                      int j = packetplayincustompayload.b().readInt();
                      Container container = this.player.activeContainer;
  
                      if (container instanceof ContainerMerchant) {
                          ((ContainerMerchant) container).d(j);
                      }
                  } catch (Exception exception2) {
                      IllegalPacketEvent.process(player.getBukkitEntity(), "InvalidTrade", "Invalid trade data!", exception2); // Paper
                  }
              } else {
                  TileEntity tileentity;
  
                  if ("MC|AdvCmd".equals(s)) {
                      if (!this.minecraftServer.getEnableCommandBlock()) {
                          this.player.sendMessage(new ChatMessage("advMode.notEnabled", new Object[0]));
                          return;
                      }
  
                      if (!this.player.isCreativeAndOp()) {
                          this.player.sendMessage(new ChatMessage("advMode.notAllowed", new Object[0]));
                          return;
                      }
  
                      packetdataserializer = packetplayincustompayload.b();
  
                      try {
                          byte b0 = packetdataserializer.readByte();
                          CommandBlockListenerAbstract commandblocklistenerabstract = null;
  
                          if (b0 == 0) {
                              tileentity = this.player.world.getTileEntity(new BlockPosition(packetdataserializer.readInt(), packetdataserializer.readInt(), packetdataserializer.readInt()));
                              if (tileentity instanceof TileEntityCommand) {
                                  commandblocklistenerabstract = ((TileEntityCommand) tileentity).getCommandBlock();
                              }
                          } else if (b0 == 1) {
                              Entity entity = this.player.world.getEntity(packetdataserializer.readInt());
  
                              if (entity instanceof EntityMinecartCommandBlock) {
                                  commandblocklistenerabstract = ((EntityMinecartCommandBlock) entity).getCommandBlock();
                              }
                          }
  
                          String s2 = packetdataserializer.e(packetdataserializer.readableBytes());
                          boolean flag = packetdataserializer.readBoolean();
  
                          if (commandblocklistenerabstract != null) {
                              commandblocklistenerabstract.setCommand(s2);
                              commandblocklistenerabstract.a(flag);
                              if (!flag) {
                                  commandblocklistenerabstract.b((IChatBaseComponent) null);
                              }
  
                              commandblocklistenerabstract.i();
                              this.player.sendMessage(new ChatMessage("advMode.setCommand.success", new Object[] { s2}));
                          }
                      } catch (Exception exception3) {
                          PlayerConnection.LOGGER.error("Couldn\'t set command block", exception3);
                          this.disconnect("Invalid command data!"); // CraftBukkit
                      }
                  } else if ("MC|AutoCmd".equals(s)) {
                      if (!this.minecraftServer.getEnableCommandBlock()) {
                          this.player.sendMessage(new ChatMessage("advMode.notEnabled", new Object[0]));
                          return;
                      }
  
                      if (!this.player.isCreativeAndOp()) {
                          this.player.sendMessage(new ChatMessage("advMode.notAllowed", new Object[0]));
                          return;
                      }
  
                      packetdataserializer = packetplayincustompayload.b();
  
                      try {
                          CommandBlockListenerAbstract commandblocklistenerabstract1 = null;
                          TileEntityCommand tileentitycommand = null;
                          BlockPosition blockposition = new BlockPosition(packetdataserializer.readInt(), packetdataserializer.readInt(), packetdataserializer.readInt());
                          TileEntity tileentity1 = this.player.world.getTileEntity(blockposition);
  
                          if (tileentity1 instanceof TileEntityCommand) {
                              tileentitycommand = (TileEntityCommand) tileentity1;
                              commandblocklistenerabstract1 = tileentitycommand.getCommandBlock();
                          }
  
                          String s3 = packetdataserializer.e(packetdataserializer.readableBytes());
                          boolean flag1 = packetdataserializer.readBoolean();
                          TileEntityCommand.Type tileentitycommand_type = TileEntityCommand.Type.valueOf(packetdataserializer.e(16));
                          boolean flag2 = packetdataserializer.readBoolean();
                          boolean flag3 = packetdataserializer.readBoolean();
  
                          if (commandblocklistenerabstract1 != null) {
                              EnumDirection enumdirection = (EnumDirection) this.player.world.getType(blockposition).get(BlockCommand.a);
                              IBlockData iblockdata;
  
                              switch (tileentitycommand_type) {
                              case SEQUENCE:
                                  iblockdata = Blocks.dd.getBlockData();
                                  this.player.world.setTypeAndData(blockposition, iblockdata.set(BlockCommand.a, enumdirection).set(BlockCommand.b, Boolean.valueOf(flag2)), 2);
                                  break;
  
                              case AUTO:
                                  iblockdata = Blocks.dc.getBlockData();
                                  this.player.world.setTypeAndData(blockposition, iblockdata.set(BlockCommand.a, enumdirection).set(BlockCommand.b, Boolean.valueOf(flag2)), 2);
                                  break;
  
                              case REDSTONE:
                                  iblockdata = Blocks.COMMAND_BLOCK.getBlockData();
                                  this.player.world.setTypeAndData(blockposition, iblockdata.set(BlockCommand.a, enumdirection).set(BlockCommand.b, Boolean.valueOf(flag2)), 2);
                              }
  
                              tileentity1.A();
                              this.player.world.setTileEntity(blockposition, tileentity1);
                              commandblocklistenerabstract1.setCommand(s3);
                              commandblocklistenerabstract1.a(flag1);
                              if (!flag1) {
                                  commandblocklistenerabstract1.b((IChatBaseComponent) null);
                              }
  
                              tileentitycommand.b(flag3);
                              commandblocklistenerabstract1.i();
                              if (!UtilColor.b(s3)) {
                                  this.player.sendMessage(new ChatMessage("advMode.setCommand.success", new Object[] { s3}));
                              }
                          }
                      } catch (Exception exception4) {
                          PlayerConnection.LOGGER.error("Couldn\'t set command block", exception4);
                          this.disconnect("Invalid command data!"); // CraftBukkit
                      }
                  } else {
                      int k;
  
                      if ("MC|Beacon".equals(s)) {
                          if (this.player.activeContainer instanceof ContainerBeacon) {
                              try {
                                  packetdataserializer = packetplayincustompayload.b();
                                  k = packetdataserializer.readInt();
                                  int l = packetdataserializer.readInt();
                                  ContainerBeacon containerbeacon = (ContainerBeacon) this.player.activeContainer;
                                  Slot slot = containerbeacon.getSlot(0);
  
                                  if (slot.hasItem()) {
                                      slot.a(1);
                                      IInventory iinventory = containerbeacon.e();
  
                                      iinventory.setProperty(1, k);
                                      iinventory.setProperty(2, l);
                                      iinventory.update();
                                  }
                              } catch (Exception exception5) {
                                  IllegalPacketEvent.process(player.getBukkitEntity(), "InvalidBeacon", "Invalid beacon data!", exception5); // Paper
                              }
                          }
                      } else if ("MC|ItemName".equals(s)) {
                          if (this.player.activeContainer instanceof ContainerAnvil) {
                              ContainerAnvil containeranvil = (ContainerAnvil) this.player.activeContainer;
  
                              if (packetplayincustompayload.b() != null && packetplayincustompayload.b().readableBytes() >= 1) {
                                  String s4 = SharedConstants.a(packetplayincustompayload.b().e(32767));
  
                                  if (s4.length() <= 35) {
                                      containeranvil.a(s4);
                                  }
                              } else {
                                  containeranvil.a("");
                              }
                          }
                      } else if ("MC|Struct".equals(s)) {
                          if (!this.player.isCreativeAndOp()) {
                              return;
                          }
  
                          packetdataserializer = packetplayincustompayload.b();
  
                          try {
                              BlockPosition blockposition1 = new BlockPosition(packetdataserializer.readInt(), packetdataserializer.readInt(), packetdataserializer.readInt());
                              IBlockData iblockdata1 = this.player.world.getType(blockposition1);
  
                              tileentity = this.player.world.getTileEntity(blockposition1);
                              if (tileentity instanceof TileEntityStructure) {
                                  TileEntityStructure tileentitystructure = (TileEntityStructure) tileentity;
                                  byte b1 = packetdataserializer.readByte();
  
                                  s1 = packetdataserializer.e(32);
                                  tileentitystructure.a(TileEntityStructure.UsageMode.valueOf(s1));
                                  tileentitystructure.a(packetdataserializer.e(64));
                                  int i1 = MathHelper.clamp(packetdataserializer.readInt(), -32, 32);
                                  int j1 = MathHelper.clamp(packetdataserializer.readInt(), -32, 32);
                                  int k1 = MathHelper.clamp(packetdataserializer.readInt(), -32, 32);
  
                                  tileentitystructure.b(new BlockPosition(i1, j1, k1));
                                  int l1 = MathHelper.clamp(packetdataserializer.readInt(), 0, 32);
                                  int i2 = MathHelper.clamp(packetdataserializer.readInt(), 0, 32);
                                  int j2 = MathHelper.clamp(packetdataserializer.readInt(), 0, 32);
  
                                  tileentitystructure.c(new BlockPosition(l1, i2, j2));
                                  String s5 = packetdataserializer.e(32);
  
                                  tileentitystructure.b(EnumBlockMirror.valueOf(s5));
                                  String s6 = packetdataserializer.e(32);
  
                                  tileentitystructure.b(EnumBlockRotation.valueOf(s6));
                                  tileentitystructure.b(packetdataserializer.e(128));
                                  tileentitystructure.a(packetdataserializer.readBoolean());
                                  tileentitystructure.e(packetdataserializer.readBoolean());
                                  tileentitystructure.f(packetdataserializer.readBoolean());
                                  tileentitystructure.a(MathHelper.a(packetdataserializer.readFloat(), 0.0F, 1.0F));
                                  tileentitystructure.a(packetdataserializer.h());
                                  String s7 = tileentitystructure.a();
  
                                  if (b1 == 2) {
                                      if (tileentitystructure.q()) {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.save_success", new Object[] { s7})), false);
                                      } else {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.save_failure", new Object[] { s7})), false);
                                      }
                                  } else if (b1 == 3) {
                                      if (!tileentitystructure.E()) {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.load_not_found", new Object[] { s7})), false);
                                      } else if (tileentitystructure.r()) {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.load_success", new Object[] { s7})), false);
                                      } else {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.load_prepare", new Object[] { s7})), false);
                                      }
                                  } else if (b1 == 4) {
                                      if (tileentitystructure.p()) {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.size_success", new Object[] { s7})), false);
                                      } else {
                                          this.player.a((IChatBaseComponent) (new ChatMessage("structure_block.size_failure", new Object[0])), false);
                                      }
                                  }
  
                                  tileentitystructure.update();
                                  this.player.world.notify(blockposition1, iblockdata1, iblockdata1, 3);
                              }
                          } catch (Exception exception6) {
                              PlayerConnection.LOGGER.error("Couldn\'t set structure block", exception6);
                              this.disconnect("Invalid structure data!"); // CraftBukkit
                          }
                      } else if ("MC|PickItem".equals(s)) {
                          packetdataserializer = packetplayincustompayload.b();
  
                          try {
                              k = packetdataserializer.g();
                              this.player.inventory.d(k);
                              this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-2, this.player.inventory.itemInHandIndex, this.player.inventory.getItem(this.player.inventory.itemInHandIndex)));
                              this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-2, k, this.player.inventory.getItem(k)));
                              this.player.playerConnection.sendPacket(new PacketPlayOutHeldItemSlot(this.player.inventory.itemInHandIndex));
                          } catch (Exception exception7) {
                              IllegalPacketEvent.process(player.getBukkitEntity(), "InvalidPickItem", "Invalid PickItem", exception7); // Paper
                          }
                      }
                      // CraftBukkit start
                      else if (packetplayincustompayload.a().equals("REGISTER")) {
                          try {
                              String channels = packetplayincustompayload.b().toString(com.google.common.base.Charsets.UTF_8);
                              for (String channel : channels.split("\0")) {
                                  getPlayer().addChannel(channel);
                              }
                          } catch (Exception ex) {
                              PlayerConnection.LOGGER.error("Couldn\'t register custom payload", ex);
                              this.disconnect("Invalid payload REGISTER!");
                          }
                      } else if (packetplayincustompayload.a().equals("UNREGISTER")) {
                          try {
                              String channels = packetplayincustompayload.b().toString(com.google.common.base.Charsets.UTF_8);
                              for (String channel : channels.split("\0")) {
                                  getPlayer().removeChannel(channel);
                              }
                          } catch (Exception ex) {
                              PlayerConnection.LOGGER.error("Couldn\'t unregister custom payload", ex);
                              this.disconnect("Invalid payload UNREGISTER!");
                          }
                      } else {
                          try {
                              byte[] data = new byte[packetplayincustompayload.b().readableBytes()];
                              packetplayincustompayload.b().readBytes(data);
                              server.getMessenger().dispatchIncomingMessage(player.getBukkitEntity(), packetplayincustompayload.a(), data);
                          } catch (Exception ex) {
                              PlayerConnection.LOGGER.error("Couldn\'t dispatch custom payload", ex);
                              this.disconnect("Invalid custom payload!");
                          }
                      }
                      // CraftBukkit end
                  }
              }
          }
  
      }
  
      // CraftBukkit start - Add "isDisconnected" method
      public final boolean isDisconnected() {
          return (!this.player.joining && !this.networkManager.isConnected()) || this.processedDisconnect; // Paper
      }
  }
  